Audio Mixer

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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}}
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==Overview==
 
==Overview==
  
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A DirectShow filter for real-time mixing of multiple audio streams.
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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.
  
 
==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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MediaLooks Audio Mixer is a DirectShow filter for real-time mixing of multiple audio streams. (For video mixing features please see our Video Mixer DS filter or object.)
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==Supported Content==
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Features:
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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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The image below illustrates how 2 stereo inputs are mixed into one mono output with a 30% decrease of volume.
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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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== 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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* Input/output format: simple (WAVE_FORMAT_PCM), multichannel (WAVE_FORMAT_EXTENSIBLE) or float (WAVE_FORMAT_IEEE_FLOAT) Audio.
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* Audio frequencies must be the same for all input and output streams.
  
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DirectShow Filters -> MediaLooks AudioMixer
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==Future Extentions==
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MediaLooks Filters -> MediaLooks AudioMixer
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== GraphEdit usage instructions ==
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* Resampling (connections with different audio frequencies will be allowed).
  
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Render two (or more) media files in GraphEdit. Connect uncompressed
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==See also==
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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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* [[Audio Mixer: Technical Specs]]
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shows the rendered output pins - if you have rendered only one one
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* [[Audio Mixer: Usage In GraphEdit]]
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output pin, only "AM Out 01" is displayed.
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* [[Audio Mixer DirectShow Filter: Release Notes]]
  
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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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===Action Items===
  
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For editing the grid - either double click or press "Space" or "F2".
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* {{Audio Mixer: Download}}
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* {{Contact Support}}
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* {{Place Order!}}
  
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For example, if you have two input stereo streams and you wish to mix
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{{Prices|950|1650|2400|300606777|300606778|300606779}}
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these streams in such a way that both of the input left channels are
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mixed to the right output channel and both input right channels - to
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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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<!--[[Category:DirectShow Filters]]
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* Audio (Video) delay filter
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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 <div class="floatright">Buy.jpg</div>
Single Developer License 1650 EUR <div class="floatright">Buy.jpg</div>
Team License 2400 EUR <div class="floatright">Buy.jpg</div>
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