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Questions tagged [mu-law]

µ-law (a.k.a. mu-law) is an algorithm used in audio processing.

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Generate .wav audio file with "ulaw" encoding in Android

I'm trying to generate a wav file with ulaw encoding from raw pcm data. I have tried some of the solutions by finding in google and here, but I can't seem to make the audio nicely playable. Its noisy and sort of screenching sound. May be the audio…
Lavanya
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Creating a mulaw audio file from L16

I have a wave file with these properties. sampling rate = 16000 Hz encoding = L16 channels = 1 bit resolution = 16 I want to make 2 pipelines 1) I am throwing this file contents as RTP packets on port=5000 2) listen to port=500…
RC0993
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Converting mono PCM to uLaw code to stereo

I have some c# code that has two functions. One converts linear PCM data to MuLaw format. The other function converts it back. public static Byte[] LinearToMulaw(Byte[] bytes, int bitsPerSample, int channels) public static Byte[]…
Tom
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Conversion from u-law to PCM, 16 bit

I am currently using two functions in my C source code to convert A-law files to PCM 16 bit and U-law files to PCM 16 bit. The conversion of U-law files to PCM 16 bit is not successfull. There is a lot of noise to the produced PCM 16 bit file. Below…
A.Lap
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I'm trying to convert ulaw PCM to Linear PCM in Java

Created code to change the PCM file encoded in java to ulaw to Linear PCM in a normal way. Because it's a test code, it's simple to configure, and when you run it, the ulaw PCM is converted to a specific folder as Linear PCM. So I got the file and…
SummerBoot
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Speaker outputs bursts of static when running Node.js WebSocket server with “audio/x-mulaw” data from Twilio

I'm trying to create a Node.js WebSocket server that receives audio data in the form of a base64-encoded string from Twilio. The decoded audio data is then written to the speaker using the write() method. Twilio says that it sends data in…
Gabe Koleszar
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Nodejs/c++ addon - getting error "undefined symbol: speech_config_from_subscription" from Microsoft speech SDK on ubuntu 18.4 server

Actually, I want to do speech transcription with passing MULAW (g711) audio format to microsoft-speech-sdk (Nodejs), but MULAW streaming audio format is not supported to microsoft-speech-sdk (Nodejs). So, for this required GStreamer with C++. So,…
Tushar Kadam
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does converting from mulaw to linear impact audio quality?

I want to change audio encoding from mulaw to linear in order to use a linear speech recognition model from Google. I'm using a telephony channel, so audio is encoded in mulaw, 8bits, 8000Hz. When I use Google Mulaw model, there are some issue with…
ylvi-bux
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How to convert ulaw format file to wav format reactjs

I am trying to play .ulaw format in reactjs, I didn't find any straight forward way to play the ulaw file. So I tried to convert ulaw format to wav, by using the wavfile plugin. But after conversion it playing different noise, I am not able to…
u_pendra
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Say "hello" when Twilio call connected

I have a websocket in python Flask that listens to a twilio call. When the call is started I want to say "hello" here is the code. if data['event'] == "start": speakBytes = speaker.speak("Hello") // using micrsoft cognitive…
swarnava112
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u-law compression returns invalid file c++

I'm trying to apply the u-law algorithm to a wav file file.wav, and then create a new file file2.wav. file.wav has 16 bits/sample, and I want to obtain a file2.wav that has 8 bits/sample. This is my code: #define _CRT_SECURE_NO_DEPRECATE #include…
Mr. Wizard
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MULAW - Audio data is being streamed too slow

I have a problem with speech recognition in streaming mode. My audio source is a VoIP phone protocol (SIP), it allows you to output audio data in a format: "encoding": "Mulaw", "sampleRateHertz": 8000 When I send a new portion of data in streaming…
user2403256
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Too fast playback mu-law gstreamer1.0

I dumped raw RTP payload in mu-law format into a file and feeded this file into gstreamer like this: gst-launch-1.0 filesrc location=interlocutor2.raw ! audio/x-mulaw, rate=8000, channels=1 ! mulawdec ! audioconvert ! audioresample !…
Vlad Chernyshov
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