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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.

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
    Search results for 'How to set the volume on a PortAudio stream' (newsgroups and mailing lists) 19 replies [Freeswitch-users] Portaudio Improvements. started 2011-01-21 23:00:19 UTC. [email protected]. 65 replies [jOrgan-user] [Testing] WDMKS and ASIO drivers for the Fluidsynth Sound Element ...

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.

Using Portaudio in Windows, with device select, volume …

    https://github.com/OpenCPN/OpenCPN/pull/1407
    Using the Portaudio API, for all Sounds in Windows. When PORTAUDIO in enabeled in cmake config. For this the File "libsndfile-1.dll" must be insert to "buildwin". And "sndfile.h" to buldwin/include. With enable this feature, the are Sliders vor Volume and Playtime in Option dialog and a ChoiseBox to select the Sound Card.

PortAudio - an Open-Source Cross-Platform Audio API

    http://www.portaudio.com/docs.html
    PortAudio is a cross platform, open-source, audio I/O library. It provides a very simple API for recording and/or playing sound using a simple callback function.

PortAudio: portaudio.h File Reference

    http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html
    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.

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 …

PyAudio: PortAudio v19 Python Bindings

    https://people.csail.mit.edu/hubert/pyaudio/
    PyAudio 0.2.3 fixes several outstanding bugs ( thanks to all who have sent patches); see the CHANGELOG for details. PyAudio 0.2.3 provides bindings for PortAudio-v19 (r1395) and now includes binary distributions for Python 2.4, 2.5, and 2.6. PyAudio 0.2.0 now works with both Python 2.4 and Python 2.5.

PyAudio Documentation — PyAudio 0.2.11 documentation

    https://people.csail.mit.edu/hubert/pyaudio/docs/
    To use PyAudio, first instantiate PyAudio using pyaudio.PyAudio () (1), which sets up the portaudio system. To record or play audio, open a stream on the desired device with the desired audio parameters using pyaudio.PyAudio.open () (2). This sets up a …

Audio Device API (2.10) - PJSIP

    https://www.pjsip.org/pjmedia/docs/html/group__audio__device__api.htm
    Info: You can set the device settings when opening audio stream by setting the flags and the appropriate setting in pjmedia_aud_param when calling pjmedia_aud_stream_create() Info: Once the audio stream is running, you can retrieve or change the stream setting by specifying the capability in pjmedia_aud_stream_get_cap() and pjmedia_aud_stream_set_cap() respectively.

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