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How to set the volume on a PortAudio stream

https://portaudio.music.columbia.narkive.com/tfeGquxT/how-to-set-the-volume-on-a-portaudio-stream

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windows - Set audio input level using portaudio - Stack ...

https://stackoverflow.com/questions/22562741/set-audio-input-level-using-portaudio

Code do the following to adjust volume. mp_mixer = Px_OpenMixer (mp_inputStream, m_dev_num); if (mp_mixer) Px_SetInputVolume (mp_mixer, m_volume); I have discovered, that underling winmme functions does not work in Windows Vista and newer.

PortAudio - an Open-Source Cross-Platform Audio API

http://portaudio.com/

PortAudio is a free, cross-platform, open-source, audio I/O library. It lets you write simple audio programs in 'C' or C++ that will compile and run on many platforms including Windows, Macintosh OS X, and Unix (OSS/ALSA). It is intended to promote the exchange of audio software between developers on different platforms.

PortAudio: Opening a Stream Using Defaults

http://www.portaudio.com/docs/v19-doxydocs/open_default_stream.html

PortAudio. The next step is to open a stream, which is similar to opening a file. You can specify whether you want audio input and/or output, how many channels, the data format, sample rate, etc. Opening a ''default'' stream means opening the default input and output devices, which saves you the trouble of getting a list of devices and choosing ...

c - Controlling audio volume in real time - Stack Overflow

https://stackoverflow.com/questions/15776390/controlling-audio-volume-in-real-time

You can manipulate the amplitude of a PCM audio stream by applying a multiplier to each sample. You can do this just prior to passing each buffer (sample set) to PortAudio. It is as simple as: float buffer[SAMPLES_PER_BUFFER]; const float volumeMultiplier = 0.2f; for(int i = 0; i < SAMPLES_PER_BUFFER; ++i) { buffer[i] *= volumeMultiplier; }

Duck other music and play stream · Issue #646 · …

https://github.com/PortAudio/portaudio/issues/646

I am trying to duck (lower volume) music playing in media app (VLC) and simultaneously want to play my stream from portaudio. Is there any way to achieve this goal?? The text was updated successfully, but these errors were encountered:

Volume control? · Issue #159 · spatialaudio/python ...

https://github.com/spatialaudio/python-sounddevice/issues/159

You can simply vector-multiply stream data, in this case ndarray to increase or decrease volume. Increasing multiplier will make sound a bit louder, but with completely broken high freq. sound above certain level, probably due to value going over the limit. Usable range is …

PortAudio: PortAudio Tutorials

http://portaudio.com/docs/v19-doxydocs/tutorial_start.html

Programming with PortAudio. Below are the steps to writing a PortAudio application using the callback technique: Write a callback function that will be called by PortAudio when audio processing is needed. Initialize the PA library and open a stream for audio I/O. Start the stream.

Play and Record Sound with Python — python-sounddevice ...

http://python-sounddevice.readthedocs.io/en/0.3.11/

The PortAudio stream callback runs at very high or real-time priority. It is required to consistently meet its time deadlines. Do not allocate memory, access the file system, call library functions or call other functions from the stream callback that may block or take an unpredictable amount of time to complete.

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