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Questions tagged [sample-rate]

136 questions
33
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2 answers

How to convert any mp3 file to .wav 16khz mono 16bit

Please, help to choose solution for converting any mp3 file to special .wav - I'm a newbie with Linux command line tools, so It's hard for me right now. I need to get wav with 16khz mono 16bit sound properties from any mp3 file. I was trying ffmpeg…
Alve
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30
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1 answer

AudioTrack samplerate inconsistencies

Using AudioTrack for playback, I sometimes need to resample audio that do not conform to the sample rates supported by AudioTrack. In doing so, I need to determine the maximum sample rate supported by AudioTrack, under the current device, under the…
initramfs
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28
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7 answers

Change sample rate of AudioContext (getUserMedia)

Im trying to record a 48000Hz recording via getUserMedia. But without luck. The returned audio MediaStream returns 44100Hz. How can i set this to 48000Hz? Here are snippets of my code: var startUsermedia = this.startUsermedia; …
f.lorenzo
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19
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5 answers

How can I detect these audio abnormalities?

iOS has an issue recording through some USB audio devices. It cannot be reliably reproduced (happens every 1 in ~2000-3000 records in batches and silently disappears), and we currently manually check our audio for any recording issues. It results in…
Alastair Stuart
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13
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5 answers

Android AudioRecord - Won't Initialize 2nd time

Hej, im currently trying to get AudioRecord to work. Because I need it in a bigger project. But it seems to mess up a lot. I have been trying alot of things, so I went back to basic when I traced this bug. I am using my Samsung Galaxy S as my…
Anders Metnik
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10
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3 answers

How to calculate audio file size?

You have 30 seconds audio file sampled at a rate of 44.1 KHz and quantized using 8 bits ; calculate the bit rate and the size of mono and stereo versions of this file ؟؟
Osama Al-far
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9
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1 answer

OS X / iOS - Sample rate conversion for a buffer using AudioConverterFillComplexBuffer

I'm writing a CoreAudio backend for an audio library called XAL. Input buffers can be of various sample rates. I'm using a single audio unit for output. Idea is to convert the buffers and mix them prior to sending them to the audio unit. Everything…
Ivan Vučica
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9
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3 answers

Check audio's sample rate using python

I have over a thousand audio files and I want to check if their sample rate is 16kHz. To do it manually, it would take me forever. Is there a way to check the sample rate using python.
ash
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7
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1 answer

how to use sox to compress mp3?

I'd like to reduce the file size of some mp3 audios with sox. I think I can reduce stereo to only 1 channel (i.e. mono), reduce the sample rate and reduce the bit-depth. I find it seems sox can do none of that. Is this true or did I have done it…
RNA
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7
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3 answers

Setting sample rate on AUHAL

I'm using Audio Unit Framework to develop a VOIP app on mac os x. In my program, I set up an input AUHAL and use the default stream format (44.1kHz,32bit/channel) to capture the audio from mic. In this case, my program works fine. Here is the…
Jun Liu
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6
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1 answer

Pydub Slice Audio Segment By Sample

Suppose I have two audio segments of the same sample rate that I have imported from .wav files in Pydub, and assume I know which is shorter. Now suppose I want to split the longer audio file into two segments so that the first segment is the exact…
jippyjoe4
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6
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1 answer

sox file.wav -r 10 file.dat

What does a sample of a audio file contain ? When I run the command "sox file.wav -r 10 file.dat", the output is something like ; Sample Rate 10 ; Channels 2 0 0.00085449219 -0.0007019043 0.1 0.01348877 …
Prakash Raman
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6
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1 answer

How to set audio sample rate on AVCaptureSession?

I am using AVCaptureSession to record video and audio into sample buffers using AVCaptureVideoDataOutput and AVCaptureAudioDataOutput. The default audio sample rate for the iPhone (4 and 4S) is 44100Hz. I would like to set this to 48000Hz however…
Avner
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5
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9 answers

Library for samplerate conversion of audio data?

What is a good Delphi library for samplerate conversion of audio data? I don't mind paying for something. I need to upsample and download sample audio in realtime. I understand the theory but don't want to write my own routines. EDIT: Bonus points…
Shannon Matthews
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5
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1 answer

How to set Audio Sampling rate higher than 44.1kHz on linux/android platform?

I noticed that android.media.AudioRecord failed to work when using wrong sampleRateInHz REPRODUCE You can also reproduce easily that issue using pcmrecorder on Samsung Nexus S (by Google)…
RzR
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