posted 28 January 2001 15:27            

• In Kyma, the output of each module has both a left and a right channel:
-A MONO output has the *same* signal on both the left and right channels.
-A Stereo output can have differences between the right and left channels

• The output of most modules is MONO.
Except: Modules that have Left and Right scale factors as parameters including:
Gain, Attenuator, Mixer (all flavors) which have STEREO outputs
Other STEREO output modules: Product, VCA, GrainCloud, SampleCloud
Live inputs or samples with check boxes for stereo: GenericSource, AudioInput, Sample

• Most modules expect a MONO input. Internally, these modules take a mono mix of the left and right inputs they receive. In other words, they use ((left + right) / 2) as the input stream.
Except: The Stereo output modules: Gain, Attenuator, Mixer (all flavors), Product, VCA

• In the StereoMix2, StereoMix4, and Pan modules, the "pan" control works as follows:
1. Left and right scale factors are computed using a function that maintains constant *power* (not constant amplitude) throughout the entire pan.
2. The left input is scaled by the left factor, and the right input is scaled by the right factor
For mono inputs (same signal in both the left and right channels), this results in a constant-power pan. For stereo inputs, the "pan" control will act the same as a "balance" control on a standard hardware mixer.

• In the Spatializing category of the Prototypes, you will find modules for:
-Taking *just* the left or right channel output from a Sound (Channeller)
-Joining a left and right channel from different Sounds without mixing (ChannelJoin)
-Crossing the left channel over to the right channel and vice versa (ChannelCrosser)

• In the Filters-Stereo category of the Prototypes, you'll find examples showing how to take a Stereo input module; split it into two branches: left channel only and right channel only; process each branch independently; and join the two branches back together for a stereo output. You can use these as templates for constructing your own stereo processing modules--just substitute your own processing module or chain in place of the filters in these examples.

• In the timeline, the contribution of each track to the full mix is assumed to be MONO. However, if you drag a Stereo Sound into the track, it will play both channels, centered around whatever stereo position you've given to the track. The (optional) input to each track is MONO. To create a stereo input, you can assign the left channel as the input to one track and the right channel as the input to another track.

(NB: The spectral analysis and FFT modules also have two output channels, but these have nothing to do with stereo speaker placement. They are simply two abstract channels of information flowing from one module into the next. You can use the Channeller, ChannelCrosser, and ChannelJoin modules to manipulate these two channels.)