Identification API

Request this API you should use “multipart/form-data” Content-Type. You can use this API to identify all of the audio formats or fingerprint extracted with our SDK/Tools. We suggest you use data type “fingerprint”, which will reduce the internet bandwidth and accelerate recognition speeds. Also, we suggest you do not use a large file to request this API, this can cause delays, its advised to reduce the file size before upload, files that are less than 15 seconds are generally better.

Identifying an audio file or a fingerprint file

POST https://identify-eu-west-1.acrcloud.com/v1/identify

Request Body

Name	Type	Description
sample	object	The audio file or the fingerprint file
access_key	string	The project access_key
sample_bytes	number	The file size should be below 5M Bytes.
timestamp	string	Timestamp (the time since the Epoch)
signature	string	Requests to ACRCloud server must be signed. That is, they must include information that ACRCloud can use to authenticate the requestor. string_to_sign = http_method+"\n" +http_uri+"\n" +access_key+"\n" +data_type+"\n" +signature_version+"\n" +timestamp signature = base64.b64encode(hmac.new(access_secret, string_to_sign, digestmod=hashlib.sha1).digest())
data_type	string	audio or fingerprint
signature_version	number	1

Python

"""
This is a demo program which implements ACRCloud Identify Protocol V1 with the third party library "requests".
We recomment you implement your own app with "requests" too.
You can install this python library by:
1) sudo easy_install requests 
2) sudo pip install requests
"""

import base64
import hashlib
import hmac
import os
import sys
import time

import requests

'''
Replace "###...###" below with your project's host, access_key and access_secret.
'''
access_key = "###YOUR_ACCESS_KEY###"
access_secret = "###YOUR_ACCESS_SECRET###"
requrl = "https://###HOST###/v1/identify"

http_method = "POST"
http_uri = "/v1/identify"
# default is "fingerprint", it's for recognizing fingerprint,
# if you want to identify audio, please change data_type="audio"
data_type = "audio"
signature_version = "1"
timestamp = time.time()

string_to_sign = http_method + "\n" + http_uri + "\n" + access_key + "\n" + data_type + "\n" + signature_version + "\n" + str(
    timestamp)

sign = base64.b64encode(hmac.new(access_secret.encode('ascii'), string_to_sign.encode('ascii'),
                                 digestmod=hashlib.sha1).digest()).decode('ascii')

# suported file formats: mp3,wav,wma,amr,ogg, ape,acc,spx,m4a,mp4,FLAC, etc
# File size: < 1M , You'de better cut large file to small file, within 15 seconds data size is better
f = open(sys.argv[1], "rb")
sample_bytes = os.path.getsize(sys.argv[1])

files = [
    ('sample', ('test.mp3', open(sys.argv[1], 'rb'), 'audio/mpeg'))
]
data = {'access_key': access_key,
        'sample_bytes': sample_bytes,
        'timestamp': str(timestamp),
        'signature': sign,
        'data_type': data_type,
        "signature_version": signature_version}

r = requests.post(requrl, files=files, data=data)
r.encoding = "utf-8"
print(r.text)

PHP

<?php

$http_method = "POST";
$http_uri = "/v1/identify";
$data_type = "audio";
$signature_version = "1" ;
$timestamp = time() ;


// Replace "###...###" below with your project's host, access_key and access_secret.
$requrl = "http://###YOUR_HOST###/v1/identify";
$access_key =  '###YOUR_ACCESS_KEY###';
$access_secret =  '###YOUR_ACCESS_SECRET###';

$string_to_sign = $http_method . "\n" . 
                  $http_uri ."\n" . 
                  $access_key . "\n" . 
                  $data_type . "\n" . 
                  $signature_version . "\n" . 
                  $timestamp;
$signature = hash_hmac("sha1", $string_to_sign, $access_secret, true);

$signature = base64_encode($signature);

// suported file formats: mp3,wav,wma,amr,ogg, ape,acc,spx,m4a,mp4,FLAC, etc 
// File size: < 1M , You'de better cut large file to small file, within 15 seconds data size is better
$file = $argv[1];
$filesize = filesize($file);
$cfile = new CURLFile($file, "mp3", basename($argv[1]));

$postfields = array(
               "sample" => $cfile, 
               "sample_bytes"=>$filesize, 
               "access_key"=>$access_key, 
               "data_type"=>$data_type, 
               "signature"=>$signature, 
               "signature_version"=>$signature_version, 
               "timestamp"=>$timestamp);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $requrl);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$result = curl_exec($ch);
echo $result;
//$response = curl_exec($ch);
//if ($response == true) {
//    $info = curl_getinfo($ch);
//} else {
//    $errmsg = curl_error($ch);
//    print $errmsg;
//}
curl_close($ch);
?>

Java

 import java.io.BufferedOutputStream;
 import java.io.BufferedReader;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.util.Calendar;
 import java.util.HashMap;
 import java.util.Map;
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
 
 // import commons-codec-<version>.jar, download from http://commons.apache.org/proper/commons-codec/download_codec.cgi
 import org.apache.commons.codec.binary.Base64;
 
 public class IdentifyProtocolV1 {
 
 	private String encodeBase64(byte[] bstr) {
 		Base64 base64 = new Base64();
 		return new String(base64.encode(bstr));
 	}
 
 	private String encryptByHMACSHA1(byte[] data, byte[] key) {
 		try {
 			SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
 			Mac mac = Mac.getInstance("HmacSHA1");
 			mac.init(signingKey);
 			byte[] rawHmac = mac.doFinal(data);
 			return encodeBase64(rawHmac);
 		} catch (Exception e) {
 			e.printStackTrace();
 		}
 		return "";
 	}
 
 	private String getUTCTimeSeconds() {  
 	    Calendar cal = Calendar.getInstance();   
 	    int zoneOffset = cal.get(Calendar.ZONE_OFFSET);   
 	    int dstOffset = cal.get(Calendar.DST_OFFSET);    
 	    cal.add(Calendar.MILLISECOND, -(zoneOffset + dstOffset));    
 	    return cal.getTimeInMillis()/1000 + "";
 	}  
 	
 	private String postHttp(String posturl, Map<String, Object> params, int timeOut) {
 		String res = "";
 		String BOUNDARYSTR = "*****2015.03.30.acrcloud.rec.copyright." + System.currentTimeMillis() + "*****";
 		String BOUNDARY = "--" + BOUNDARYSTR + "\r\n";
 		String ENDBOUNDARY = "--" + BOUNDARYSTR + "--\r\n\r\n";
 		
 		String stringKeyHeader = BOUNDARY +
                 "Content-Disposition: form-data; name=\"%s\"" +
                 "\r\n\r\n%s\r\n";
 		String filePartHeader = BOUNDARY +
                  "Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\n" +
                  "Content-Type: application/octet-stream\r\n\r\n";		
  
 		URL url = null;
 		HttpURLConnection conn = null;
 		BufferedOutputStream out = null;
 		BufferedReader reader = null;
 		ByteArrayOutputStream postBufferStream = new ByteArrayOutputStream();
 		try {
 			for (String key : params.keySet()) {
 				Object value = params.get(key);
 				if (value instanceof String || value instanceof Integer) {
 					postBufferStream.write(String.format(stringKeyHeader, key, (String)value).getBytes());
 				} else if (value instanceof byte[]) {
 					postBufferStream.write(String.format(filePartHeader, key, key).getBytes());
 					postBufferStream.write((byte[]) value);
 					postBufferStream.write("\r\n".getBytes());
 				}
 			}
 			postBufferStream.write(ENDBOUNDARY.getBytes());
 			
 			url = new URL(posturl);
 			conn = (HttpURLConnection) url.openConnection();
 			conn.setConnectTimeout(timeOut);
 			conn.setReadTimeout(timeOut);
 			conn.setRequestMethod("POST");
 			conn.setDoOutput(true);
 			conn.setDoInput(true);
 			conn.setRequestProperty("Accept-Charset", "utf-8");
 			conn.setRequestProperty("Content-type", "multipart/form-data;boundary=" + BOUNDARYSTR);
 
 			conn.connect();
 			out = new BufferedOutputStream(conn.getOutputStream());
 			out.write(postBufferStream.toByteArray());
 			out.flush();
 			int response = conn.getResponseCode();
 			if (response == HttpURLConnection.HTTP_OK) {
 				reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
 				String tmpRes = "";
 				while ((tmpRes = reader.readLine()) != null) {
 					if (tmpRes.length() > 0)
 						res = res + tmpRes;
 				}
 			}
 		} catch (Exception e) {
 			e.printStackTrace();
 		} finally {
 			try {
 				if (postBufferStream != null) {
 					postBufferStream.close();
 					postBufferStream = null;
 				}
 				if (out != null) {
 					out.close();
 					out = null;
 				}
 				if (reader != null) {
 					reader.close();
 					reader = null;
 				}
 				if (conn != null) {
 					conn.disconnect();
 					conn = null;
 				}
 			} catch (IOException e) {
 				e.printStackTrace();
 			}
 		}
 		return res;
 	}
 
     public String recognize(String host, String accessKey, String secretKey, byte[] queryData, String queryType, int timeout)
     {
     	String method = "POST";
     	String httpURL = "/v1/identify";
     	String dataType = queryType;
     	String sigVersion = "1";
     	String timestamp = getUTCTimeSeconds();
 
     	String reqURL = "http://" + host + httpURL;
 
     	String sigStr = method + "\n" + httpURL + "\n" + accessKey + "\n" + dataType + "\n" + sigVersion + "\n" + timestamp;
     	String signature = encryptByHMACSHA1(sigStr.getBytes(), secretKey.getBytes());
 
         Map<String, Object> postParams = new HashMap<String, Object>();
         postParams.put("access_key", accessKey);
         postParams.put("sample_bytes", queryData.length + "");
         postParams.put("sample", queryData);
         postParams.put("timestamp", timestamp);
         postParams.put("signature", signature);
         postParams.put("data_type", queryType);
         postParams.put("signature_version", sigVersion);
 
         String res = postHttp(reqURL, postParams, timeout);
 
         return res;
     }
     
 	public static void main(String[] args) {
 		File file = new File("E://sample.wav");
 		byte[] buffer = new byte[1024 * 1024];
 		if (!file.exists()) {
 			return;
 		}
 		FileInputStream fin = null;
 		int bufferLen = 0;
 		try {
 			fin = new FileInputStream(file);
 			bufferLen = fin.read(buffer, 0, buffer.length);
 		} catch (Exception e) {
 			e.printStackTrace();
 		} finally {
 			try {
 				if (fin != null) {
 					fin.close();
 				}
 			} catch (IOException e) {
 				e.printStackTrace();
 			}
 		}
 		System.out.println("bufferLen=" + bufferLen);
 		
 		if (bufferLen <= 0)
 			return;
 		
 		byte[] postDatas = new byte[bufferLen];
 		System.arraycopy(buffer, 0, postDatas, 0, bufferLen);
 		IdentifyProtocolV1 a = new IdentifyProtocolV1();
 		
   // Replace "###...###" below with your project's host, access_key and access_secret.
   // recognize(String host, String accessKey, String secretKey, byte[] queryData, String queryType, int timeout)
 		String result = a.recognize("###YOUR_HOST###", "###YOUR_KEY###", "###YOUR_SECRET###", postDatas, "audio", 10000);
 		System.out.println(result);
 	}
 }

Java

import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

import java.io.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

import org.apache.commons.codec.binary.Base64;
import org.apache.http.util.EntityUtils;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

public class Recognizer {

    private String host = "identify-cn-north-1.acrcloud.cn";
    private String protocol = "https";
    private String endpoint = "/v1/identify";
    private String accessKey = "xxx";
    private String accessSecret = "xxx";
    private int timeout = 5 * 1000; // ms


    private String encodeBase64(byte[] bstr) {
        Base64 base64 = new Base64();
        return new String(base64.encode(bstr));
    }

    private String encryptByHMACSHA1(byte[] data, byte[] key) {
        try {
            SecretKeySpec signingKey = new SecretKeySpec(key, "HmacSHA1");
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signingKey);
            byte[] rawHmac = mac.doFinal(data);
            return encodeBase64(rawHmac);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

    public String recognizeByFile(String filePath, String dataType) {
        File file = new File(filePath);
        String method = "POST";
        String sigVersion = "1";
        String timestamp = System.currentTimeMillis() + "";
        String sigStr = method + "\n" + endpoint + "\n" + accessKey + "\n" + dataType + "\n" + sigVersion + "\n" + timestamp;
        String signature = encryptByHMACSHA1(sigStr.getBytes(), accessSecret.getBytes());

        CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom()
                .setConnectTimeout(timeout).setConnectionRequestTimeout(timeout)
                .setSocketTimeout(timeout).build();
        String reqUrl = protocol + "://" + host + "/" + endpoint;
        HttpPost httpPost = new HttpPost(reqUrl);
        httpPost.setConfig(requestConfig);

        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        builder.setCharset(Charset.forName("UTF-8"));
        builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

        builder.addTextBody("access_key", accessKey);
        builder.addTextBody("sample_bytes", file.length() + "");
        builder.addTextBody("timestamp", timestamp);
        builder.addTextBody("signature", signature);
        builder.addTextBody("data_type", dataType);
        builder.addTextBody("signature_version", sigVersion);

        builder.addBinaryBody("sample", file, ContentType.DEFAULT_BINARY, "sample");

        HttpEntity entity = builder.build();
        httpPost.setEntity(entity);


        String responseStr = "";
        try {
            CloseableHttpResponse response = httpClient.execute(httpPost);
            HttpEntity responseEntity = response.getEntity();
            if (responseEntity != null) {
                responseStr = EntityUtils.toString(responseEntity, StandardCharsets.UTF_8);
                System.out.println("Result:" + responseStr);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        return responseStr;
    }

    public static void main(String[] args) {
        Recognizer rec = new Recognizer();
        String result = rec.recognizeByFile("x.mp3", "audio");
        System.out.println(result);
    }
}

Javascript

var url = require('url');
var fs = require('fs');
var crypto = require('crypto');
//npm install request
const axios = require('axios');

// Replace "###...###" below with your project's host, access_key and access_secret.
var defaultOptions = {
  host: '###YOUR_HOST###',
  endpoint: '/v1/identify',
  signature_version: '1',
  data_type:'audio',
  secure: true,
  access_key: '###YOUR_ACCESS_KEY###',
  access_secret: '###YOUR_ACCESS_SECRET###'
};

function buildStringToSign(method, uri, accessKey, dataType, signatureVersion, timestamp) {
  return [method, uri, accessKey, dataType, signatureVersion, timestamp].join('\n');
}

function sign(signString, accessSecret) {
  return crypto.createHmac('sha1', accessSecret)
    .update(Buffer.from(signString, 'utf-8'))
    .digest().toString('base64');
}

/**
 * Identifies a sample of bytes
 */
function identify(data, options, cb) {

  var current_data = new Date();
  var timestamp = current_data.getTime()/1000;

  var stringToSign = buildStringToSign('POST',
    options.endpoint,
    options.access_key,
    options.data_type,
    options.signature_version,
    timestamp);

  var signature = sign(stringToSign, options.access_secret);

  const blobData = new Blob([data], { type: 'application/octet-stream' });
  var form = new FormData();
  form.append('sample', blobData, {filename: 'sample.bin',
                  contentType: 'application/octet-stream'
                  })
  form.append('sample_bytes', data.length);
  form.append('access_key', options.access_key);
  form.append('data_type', options.data_type);
  form.append('signature_version', options.signature_version);
  form.append('signature', signature);
  form.append('timestamp', timestamp);

  axios.post("http://"+options.host + options.endpoint, form, {
    headers: {
      'Content-Type': 'multipart/form-data'
    }
  }).then(function (response) {
    console.log('Response:', response.data);
  })
  .catch(function (error) {
    console.error('Error:', error.message);
  });
  
  //fetch("http://"+options.host + options.endpoint, 
  //      {method: 'POST', body: form })
  //      .then((res) => {return res.text()})
  //      .then((res) => {cb(res, null)})
  //      .catch((err) => {cb(null, err)});
}

var data = fs.readFileSync('sample.wav');

identify(data, defaultOptions, function (err, httpResponse, body) {
  if (err) console.log(err);
  console.log(body);
});

ReactNative

import React from 'react';
import {StyleSheet, Button, View, Text} from 'react-native';
import {Audio} from 'expo-av';
import {FileSystem, Permissions} from 'react-native-unimodules';
import hmacSHA1 from 'crypto-js/hmac-sha1';
import Base64 from 'crypto-js/enc-base64';
import {Buffer} from 'buffer';

export default class MusicRec_Test extends React.Component {
  constructor(props) {
    super(props);
    this.state = {response: ''};
  }
  async _findSong() {
    // Audio.setAudioModeAsync()
    const {status} = await Audio.requestPermissionsAsync();
    console.log('Current Status ' + status);
    const recording = new Audio.Recording();
    try {
      await Audio.setAudioModeAsync({
        playsInSilentModeIOS: true,
        allowsRecordingIOS: true,
      });
      const recordOptions = {
        android: {
          extension: '.m4a',
          outputFormat: Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_MPEG_4,
          audioEncoder: Audio.RECORDING_OPTION_ANDROID_AUDIO_ENCODER_AAC,
          sampleRate: 44100,
          numberOfChannels: 2,
          bitRate: 128000,
        },
        ios: {
          extension: '.wav',
          audioQuality: Audio.RECORDING_OPTION_IOS_AUDIO_QUALITY_HIGH,
          sampleRate: 8000,
          numberOfChannels: 1,
          linearPCMBitDepth: 16,
          linearPCMIsBigEndian: false,
          linearPCMIsFloat: true,
        },
      };
      await recording.prepareToRecordAsync(recordOptions);
      await recording.startAsync();
      console.log('Recording');
      await timeout(8000);
      console.log('Done recording');
      await recording.stopAndUnloadAsync();
      let recordingFile = recording.getURI();

      let result = await identify(recordingFile, defaultOptions);
      console.log(result);
      //return result;
    } catch (error) {
      console.log(error);
      console.log('Error in this!!!!');
    }
  }
  render() {
    return (
      <View style={styles.container}>
        <Button title="Find Song" onPress={this._findSong} />
        <Text />
      </View>
    );
  }
}
function timeout(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}
const defaultOptions = {
  host: '<Project Host>',
  endpoint: '/v1/identify',
  signature_version: '1',
  data_type: 'audio',
  secure: true,
  access_key: '<Project AccessKey>',
  access_secret: '<Project SecretKey>',
};
function buildStringToSign(
  method,
  uri,
  accessKey,
  dataType,
  signatureVersion,
  timestamp,
) {
  return [method, uri, accessKey, dataType, signatureVersion, timestamp].join(
    '\n',
  );
}
function signString(stringToSign, accessSecret) {
  return Base64.stringify(hmacSHA1(stringToSign, accessSecret));
}
async function identify(uri, options) {
  var current_data = new Date();
  var timestamp = current_data.getTime() / 1000;
  var stringToSign = buildStringToSign(
    'POST',
    options.endpoint,
    options.access_key,
    options.data_type,
    options.signature_version,
    timestamp,
  );
  let fileinfo = await FileSystem.getInfoAsync(uri, {size: true});
  var signature = signString(stringToSign, options.access_secret);
  var formData = {
    sample: {uri: uri, name: 'sample.wav', type: 'audio/wav'},
    access_key: options.access_key,
    data_type: options.data_type,
    signature_version: options.signature_version,
    signature: signature,
    sample_bytes: fileinfo.size,
    timestamp: timestamp,
  };
  var form = new FormData();
  for (let key in formData) {
    form.append(key, formData[key]);
  }

  let postOptions = {
    method: 'POST',
    headers: {
      'Content-Type': 'multipart/form-data',
    },
    body: form,
  };
  console.log(postOptions.body);
  let response = await fetch(
    'http://' + options.host + options.endpoint,
    postOptions,
  );
  let result = await response.text();
  console.log(result);
  return result;
}
const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#fff',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

Ruby

require 'openssl'
require 'base64'
require 'net/http/post/multipart'

# Replace "###...###" below with your project's host, access_key and access_secret.
requrl = "http://###YOUR_HOST###/v1/identify"
access_key = "###YOUR_ACCESS_KEY###"
access_secret = "###YOUR_ACCESS_SECRET###"

http_method = "POST"
http_uri = "/v1/identify"
data_type = "audio"
signature_version = "1"
timestamp = Time.now.utc().to_i.to_s

string_to_sign = http_method+"\n"+http_uri+"\n"+access_key+"\n"+data_type+"\n"+signature_version+"\n"+timestamp

digest = OpenSSL::Digest.new('sha1')
signature = Base64.encode64(OpenSSL::HMAC.digest(digest, access_secret, string_to_sign))

file_name = ARGV[0]
sample_bytes = File.size(file_name)

url = URI.parse(requrl)
File.open(file_name) do |file|
  req = Net::HTTP::Post::Multipart.new url.path,
    "sample" => UploadIO.new(file, "audio/mp3", file_name),
    "access_key" =>access_key,
    "data_type"=> data_type,
    "signature_version"=> signature_version,
    "signature"=>signature,
    "sample_bytes"=>sample_bytes,
    "timestamp" => timestamp
  res = Net::HTTP.start(url.host, url.port) do |http|
    http.request(req)
  end
  puts(res.body)
end

C-Sharp

```csharp
// See https://aka.ms/new-console-template for more information
//Console.WriteLine("Hello, World!");
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Net.Http;

namespace Rextester
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            string host = "<YOUR_PROJECT_HOST>";
            string dataType = "audio";
            string protocol = "https";
            string endpoint = "/v1/identify";
            string accessKey = "<YOUR_PROJECT_ACCESSKEY>";
            string accessSecret = "<YOUR_PROJECT_SecretKEY>";
            int timeout = 5 * 1000; // ms

            byte[] wavFile = File.ReadAllBytes("x.mp3");

            // var fileStream = new FileStream(filePath, FileMode.Open);

            string method = "POST";
            string sigVersion = "1";
            string timestamp = DateTime.Now.Ticks.ToString();
            string sigStr = method + "\n" + endpoint + "\n" + accessKey + "\n" + dataType + "\n" + sigVersion + "\n" + timestamp;
            string signature = ComputeSignature(Encoding.ASCII.GetBytes(sigStr), Encoding.ASCII.GetBytes(accessSecret));
            Console.WriteLine(signature);
            var formContent = new MultipartFormDataContent();

            formContent.Add(new StringContent(accessKey), "\"access_key\"");
            formContent.Add(new StringContent(timestamp), "\"timestamp\"");
            formContent.Add(new StringContent(signature), "\"signature\"");
            formContent.Add(new StringContent(dataType), "\"data_type\"");
            formContent.Add(new StringContent(sigVersion), "\"signature_version\"");
            formContent.Add(new StringContent(wavFile.Length.ToString()), "\"sample_bytes\"");

            var filestream = new ByteArrayContent(wavFile, 0, wavFile.Length);
            filestream.Headers.Add("Content-Type", "application/octet-stream");
            formContent.Add(filestream, "\"sample\"");

            HttpClient client = new HttpClient();
            var httpresponse = await client.PostAsync('https://'+host+"/v1/identify", formContent);
            string responseBody = await httpresponse.Content.ReadAsStringAsync();

            Console.WriteLine(responseBody);
        }
        static string ComputeSignature(byte[] body, byte[] secret)
        {
            HMACSHA1 hmac = new HMACSHA1(System.Text.Encoding.UTF8.GetBytes(secret));
            byte[] stringBytes = Encoding.UTF8.GetBytes(body);
            byte[] hashedValue = hmac.ComputeHash(stringBytes);
            string res = Convert.ToBase64String(hashedValue, 0, hashedValue.Length);
            return res;
        }
    }
}

```

200

{
    "metadata":{
        "timestamp_utc":"2020-01-19 02:58:28",
        "music":[
            {
                "db_begin_time_offset_ms":0,
                "db_end_time_offset_ms":9280,
                "sample_begin_time_offset_ms":0,
                "sample_end_time_offset_ms":9280,
                "play_offset_ms":9040,
                "artists":[
                    {
                        "name":"Adele",
                        "langs":[{"code":"zh-Hans", "name":"阿黛尔"}]
                    }
                ],
                "lyrics":{
                    "copyrights":[
                        "Sony/ATV Music Publishing LLC",
                        "Universal Music Publishing Group"
                    ]
                },
                "acrid":"6049f11da7095e8bb8266871d4a70873",
                "album":{
                    "name":"Hello",
                    "langs":[{"code":"zh-Hans","name":"Hello"}]
                },
                "rights_claim": [
                    {"distributor":{"id":"PADPIDA2007050901U", "name":"Warner Music Group"},"rights_owners":[{"name":"Warner Music Group", "share_percentage":100.00}],"rights_claim_policy":"monetize", "territories":["AD","AE","AF"]},
                    {"distributor":{"id":"PADPIDA2007040502I", "name":"Sony Music Entertainment"}, "rights_owners":[{"name":"Sony Music Entertainment", "share_percentage":100.00}],"territories":["AB","AC"]}
               ],                
               "external_ids":{
                    "iswc":"T-917.819.808-8",
                    "isrc":"GBBKS1500214",
                    "upc":"886445581959"
                },
                "result_from":3,
                "contributors":{
                    "composers":[
                        "Adele Adkins",
                        "Greg Kurstin"
                    ],
                    "lyricists":[
                        "ADELE ADKINS",
                        "GREGORY KURSTIN"
                    ]
                },
                "title":"Hello",
                "langs":[{"code":"zh-Hans","name":"Hello"}]
                "language":"en",
                "duration_ms":295000,
                "label":"XL Recording",
                "external_metadata":{
                    "musicbrainz":[
                        {
                            "track":{
                                "id":"0a8e8d55-4b83-4f8a-9732-fbb5ded9f344"
                            }
                        }
                    ],
                    "deezer":{
                        "track":{
                            "id":"110265034"
                        },
                        "artists":[
                            {
                                "id":"75798"
                            }
                        ],
                        "album":{
                            "id":"11483764"
                        }
                    },
                    "spotify":{
                        "track":{
                            "id":"4aebBr4JAihzJQR0CiIZJv"
                        },
                        "artists":[
                            {
                                "id":"4dpARuHxo51G3z768sgnrY"
                            }
                        ],
                        "album":{
                            "id":"7uwTHXmFa1Ebi5flqBosig"
                        }
                    },
                    "musicstory":{
                        "track":{
                            "id":"13106540"
                        },
                        "album":{
                            "id":"931271"
                        }
                    },
                    "youtube":{
                        "vid":"YQHsXMglC9A"
                    }
                },
                "score":100,
                "genres":[{"name":"Pop"}],
                "release_date":"2015-10-23"
                "release_by_territories": [{"territories": ["DK"], "release_date": "2006-04-17"}, {"territories": ["JP"], "release_date": "2006-10-17"}, {"territories": ["SE"], "release_date": "2005-06-21"}, {"territories": ["BG", "AL", "BA", "CZ", "EE", "HR", "HU", "LT", "LV", "MK", "ME", "PL", "RO", "RS", "SI", "SK", "UA"], "release_date": "2006-03-24"}, {"territories": ["GB", "IE", "NZ"], "release_date": "2005-07-18"}, {"territories": ["FR"], "release_date": "2005-07-26"}]
 
            }
        ],
        "custom_files": [
            {
                "acrid":"e6f7e3884b00fd265871754c5b64782b",
                "title":"YOUR_TITLE",
                "bucket_id":999,
                "duration_ms":295000,
                "db_begin_time_offset_ms":0,
                "db_end_time_offset_ms":9280,
                "sample_begin_time_offset_ms":0,
                "sample_end_time_offset_ms":9280,
                "key1":"value1",  //custom-defined 
                "key2":"value2"   //custom-defined 
            }
        ]
    },
    "status":{
        "msg":"Success",
        "version":"1.0",
        "code":0
    },
    "result_type":0
}