I can convert wav file to pcm ffmpeg -i file.wav -f s16le -acodec pcm_s16le file.pcm How can I revert this operation?

I want to implement SIP calls in my application, and first problem, that I need to solve, is converting audio from compressed AAC format with ADTS header to linear PCM. My input data is an NSArray...

I want to record input from the microphone, attach a reverb effect, and persist the result to a file. My use-case is an app that lets you sing a song and select different preset reverb options afte...

I know that there are a lot of resources online explaining how to deinterleave PCM data. In the course of my current project I have looked at most of them...but I have no background in audio proces...

Can someone explain what is the difference between I2S interface and PCM interface. Does I2S interface only supports i2s format audio data and not PCM format audio data ?

In JavaScript, I need to convert two bytes into a 16 bit integer, so that I can convert a stream of audio data into an array of signed PCM values. Most answers online for converting bytes to 16 bi...

I wrote a program in c++ to generate a .wav file for an 800Hz sine wave (1 channel, 8-bit, 16000Hz sampling, 32000 samples so 2 seconds long), but when I play it or examine its spectrogram in Audac...

You can use MediaRecorder to record a stream directly to AAC but there doesn't seem to be a way to encode an existing PCM/WAV file to AAC. The ability to encode to AAC exists natively in Android an...

I've been playing with this now for sometime, I cant work out what I am meant to be doing here. I am reading in PCM audio data into an audioData array: recorder.read(audioData,0,bufferSize); //r...

I have pcm audio stored in a byte array. It is 16 bits per sample. I want to make it 8 bit per sample audio. Can anyone suggest a good algorithm to do that? I haven't mentioned the bitrate becau...

The remote device is sending live raw PCM audio(no header included) in UDP packets and I need to implement a program in java to receive these packets and play them on the PC live. As I know that ra...

I am trying to convert a raw file (header-less) to wav It is in ADPCM 16 rate 8000 I have tried three console commands sox -e ima-adpcm -r 8000 input.raw output.wav sox -e ima-adpcm -r 8000 -b 1...

When I play a file with the following code: private void PlayAudioFileViaAudioTrack(int ResId) throws IOException { int intSize = android.media.AudioTrack.getMinBufferSize(11025, AudioFormat.CH...

My android application needs to convert PCM(22khz) to AMR , but the API AmrInputStream only supports with pcm of 8khz. How can i downsample the pcm from 22 khz to 8 khz?

I've been working on a audio-recognize demo for some time, and the api needs me to pass an .wav file with sample rate of 8000 or 16000, so I have to downsample it. I have tried 2 algorithms as foll...

I'm trying to write a program to display PCM data. I've been very frustrated trying to find a library with the right level of abstraction, but I've found the python wave library and have been using...

I have a PCM sound file with sample rate 16000, sample bit 16 and channel 1. I want to play it , but there's no software can do. I also tried ffplay like : ffplay -ar 16000 -ac 1 snake.raw But s...

A clear explanation seems to be missing in the PulseAudio documentation, and I cannot find any simple examples.

I have a wave file in 16bit PCM form. I've got the raw data in a byte[] and a method for extracting samples, and I need them in float format, i.e. a float[] to do a Fourier Transform. Here's my cod...

I'm debugging an audio codec and need to test if the data is coming out of a codec properly. I have my code dumping the raw pcm stream into a file and now I want to try to play it in VLC or another...

I was confused with resampling result in new ffmpeg. I decode an AAC audio into PCM, the ffmpeg show audio information as: Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 122 kb/s In new ffmpeg...

I would like to extract a channel audio from the an LPCM raw file ie extract left and right channel of a stereo LPCM file. The LPCM is 16 bit depth,interleaved, 2 channels,litle endian. From what I...

I'm developing an android application. What I need to do is reading a per recorded audio file. Audio file has been recorded and saved as .pcm file. I use this code to read the .pcm file. public do...

I understand that PCM data is stored as [left][right][left][right].... Am trying to convert a stereo PCM to mono Vorbis (*.ogg) which I understand is achievable by halving the left and the right ch...

There isn't too much info about apply this codec when we need to streaming audio. Without apply the codec, my code work like a charm establishing a communication between 2 devices but I need encode...