Audio Mixer

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'''MediaLooks Audio Mixer''' is a DirectShow filter for real-time mixing of multiple audio streams.
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<!--RM_ID:20-->
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<!--H1:Audio Mixer-->
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<!--TITLE:Audio Mixer DirectShow filter-->
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<!--DESCRIPTION:DirectShow filter for real-time mixing of multiple mono, stereo or multichannel audio streams.-->
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<!--KEYWORDS:Audio Mixer Multichannel Stereo Mono DirectShow DRC Compressor-->
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{{This|products/special_filters/audio_mixer.html}}
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{{Audio Mixer: Description}}
  
 
==Overview==
 
==Overview==
  
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The Audio Mixer DirectShow filter is designed for mixing an arbitrary number of PCM streams in various combinations.
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The Audio Mixer DirectShow filter mixes any number of mono, stereo or multichannel PCM or float streams with 8 to 32 bit depth with unlimited flexibility.
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For video mixing features please see our [[Video Mixer DirectShow Filter]].
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==Features==
 
==Features==
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[[Image:Audio-mixer.jpg|thumb|450px|3 stereo inputs are mixed into one stereo output.]]
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* '''Real-time''' mixing.
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* '''Up to 64''' mono, stereo or multichannel (up to 32 channels) input or output pins.
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* From '''8 to 32''' bits per mono audio sample for any input and output stream.
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* Unlimited '''mixing flexibility''': any channel from an input pin can be mixed to any channel of an output pin with user-defined bit depth.
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* '''Dynamic range compression''' to eliminate volume overflow (more information on [http://en.wikipedia.org/wiki/Dynamic_range_compression Wikipedia]).
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* Seeking support.
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{{.idl}}
  
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[[Image:Audio-mixer.jpg|right|thumb|300px|2 stereo inputs are mixed into one mono output with a 30% decrease of volume.]]
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==Supported Content==
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* Real-time mixing.
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* Unlimited number of stereo or mono input & output pins.
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* Unlimited mixing flexibility: any input pin can be mixed to any output pin.
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Input/output format: PCM Audio.
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===Future features===
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* Mixing of several input streams into one multichannel stream (WAVE-EX).
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* Automatic correction of input parameters to eliminate volume overflow.
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== DirectShow filter specification ==
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Audio mixer is a standard DirectShow filter.
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Number of input pins >= 1 (new pin will be added after connection of all
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free input pins).
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Number of output pins >= 1 (new pin will be added after connection of all
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free output pins).
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Input/output media type: MEDIATYPE_Audio, MEDIASUBTYPE_PCM, FORMAT_WaveFormatEx.
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Parameters of format:
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WAVEFORMATEX: wFormatTag=WAVE_FORMAT_PCM
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WAVEFORMATEX: nSamplesPerSec, wBitsPerSample: the same for all inputs/outputs.
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WAVEFORMATEX: nChannels: 1 or 2 (mono or stereo). Can be different for
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different input/output pins.
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Each input channel can be mixed with second channel of the same pin (for
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stereo inputs) or with any channel of another input pin (or several input
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pins). Input channels can be switched on another output pin in play time
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also (without graph stop).
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Notes:
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* All input frequencies should be identical (resampling not implemented in current version).
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* After start of graph the media type of output pins cannot be changed (mono to stereo and vice versa).
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The filter will have a COM interface and property page for set/get parameters of mixing (Input/channel -> Output/channel).
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== GraphEdit registration categories ==
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You can see filter in GraphEdit:
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DirectShow Filters -> MediaLooks AudioMixer
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* Input/output format: simple (WAVE_FORMAT_PCM), multichannel (WAVE_FORMAT_EXTENSIBLE) or float (WAVE_FORMAT_IEEE_FLOAT) Audio.
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MediaLooks Filters -> MediaLooks AudioMixer
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* Audio frequencies must be the same for all input and output streams.
  
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== GraphEdit usage instructions ==
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==Future Extentions==
  
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Render two (or more) media files in GraphEdit. Connect uncompressed
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* Resampling (connections with different audio frequencies will be allowed).
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outputs to the inputs of the Audio Mixer and render one or more output
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pins (AM Out) of the Audio Mixer.
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Open the property page of the Audio Mixer. The selector on the left
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==See also==
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shows the rendered output pins - if you have rendered only one one
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output pin, only "AM Out 01" is displayed.
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The grid matrix on the right defines what is to be output to the selected output pin. Values from 0 (silence - in) to 1 (original level) are accepted. In the current version an empty field will also be treated as silence. If values higher than 1 are specified, the filter will work as an amplifier.
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* [[Audio Mixer: Technical Specs]]
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* [[Audio Mixer: Usage In GraphEdit]]
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* [[Audio Mixer DirectShow Filter: Release Notes]]
  
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For editing the grid - either double click or press "Space" or "F2".
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===Action Items===
  
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For example, if you have two input stereo streams and you wish to mix
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* {{Audio Mixer: Download}}
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these streams in such a way that both of the input left channels are
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* {{Contact Support}}
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mixed to the right output channel and both input right channels - to
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* {{Place Order!}}
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the left, and at the same time decrease the volume of each channel by
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30% - this is how your grid should look like.
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==Complementary components==
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{{Prices|950|1650|2400|300606777|300606778|300606779}}
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* Audio (Video) delay filter
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[[Category:DirectShow Filters]]
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<!--[[Category:DirectShow Filters]]
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[[Category:Audio Filters]]-->
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[[Category:Special Filters]]
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__NOTOC__

Latest revision as of 15:18, 21 April 2023

This page is a copy of the original page on the AVObjects' web site and can also be viewed here. DirectShow filter for real-time mixing of multiple mono, stereo or multichannel audio streams.

Overview

The Audio Mixer DirectShow filter mixes any number of mono, stereo or multichannel PCM or float streams with 8 to 32 bit depth with unlimited flexibility.

Features

3 stereo inputs are mixed into one stereo output.
  • Real-time mixing.
  • Up to 64 mono, stereo or multichannel (up to 32 channels) input or output pins.
  • From 8 to 32 bits per mono audio sample for any input and output stream.
  • Unlimited mixing flexibility: any channel from an input pin can be mixed to any channel of an output pin with user-defined bit depth.
  • Dynamic range compression to eliminate volume overflow (more information on Wikipedia).
  • Seeking support.

Specifications and description of user interfaces can be found in the .idl file in the \Idl folder of the filter installation directory.

Supported Content

  • Input/output format: simple (WAVE_FORMAT_PCM), multichannel (WAVE_FORMAT_EXTENSIBLE) or float (WAVE_FORMAT_IEEE_FLOAT) Audio.
  • Audio frequencies must be the same for all input and output streams.

Future Extentions

  • Resampling (connections with different audio frequencies will be allowed).

See also

Action Items

Prices

Single Application License 950 EUR


Single Developer License 1650 EUR


Team License 2400 EUR
Retrieved from "http://wiki.avobjects.com/index.php?title=Audio_Mixer&oldid=14841"
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