Audio Mixer
From AVObjects Knowledge Base
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 multichannel audio streams.
Overview
- Download a full-featured 30-day evaluation version!
- Contact us to receive a quote or if you have any technical questions!
The Audio Mixer DirectShow filter mixes any number of mono, stereo or multichannel streams in all kinds of combinations.
is designed for mixing an arbitrary number of multichannel (up to 32 channels) PCM streams with 8 - 32 bits per mono audio sample in various combinations.
If you need a DS filter for video, see Video Mixer DirectShow Filter. If you need both, check our Vision Mixer SDK, Live Chroma Key SDK or Virtual Studio SDK.
Features
- Real-time mixing.
- Unlimited number of mono, stereo or multichannel (up to 32 channels) input and 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.
Future Extentions:
- Resampling (connections with different frequencies will be allowed).
Technical Specs
Supported Content
Input/output format: simple (WAVE_FORMAT_PCM) and multichannel (WAVE_FORMAT_EXTENSIBLE) PCM Audio. Frequencies must be the same for all input and output streams.
Properties of filter
| Filter Interfaces: | IBaseFilter, IPersistStream, ISpecifyPropertyPages, IMLAudioMixer |
| Input Pin Media Types | MEDIATYPE_Audio, MEDIASUBTYPE_PCM, FORMAT_WaveFormatEx WAVEFORMATEX struct (wFormatTag = WAVE_FORMAT_PCM) WAVEFORMATEXTENSIBLE struct (Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE) |
| Input Pin Interfaces | IMemInputPin, IPin, IQualityControl |
| Output Pin Media Types | MEDIATYPE_Audio, MEDIASUBTYPE_PCM, FORMAT_WaveFormatEx WAVEFORMATEX struct (wFormatTag = WAVE_FORMAT_PCM) WAVEFORMATEXTENSIBLE struct (Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE) |
| Output Pin Interfaces | IMediaSeeking, IPin, IQualityControl |
| Merit | MERIT_DO_NOT_USE |
| Filter Categories | CLSID_LegacyAmFilterCategory, CLSID_MediaLooksCategory |
See also
- Audio Mixer: DirectShow Specs
- Audio Mixer: Usage In GraphEdit
- Audio Mixer DirectShow Filter: Release Notes
Downloads
Licensing
If you are interested in licensing this product please contact us through the link below.
