Re: [ecasound] [linux-audio-dev] New "plugin" (fwd)

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Subject: Re: [ecasound] [linux-audio-dev] New "plugin" (fwd)
From: Kai Vehmanen (
Date: Fri Dec 08 2000 - 02:59:40 EET

On Thu, 7 Dec 2000, S. Massy wrote:

>> Applyplugin doesn't do any channel routing, so your input file must
>> have exactly one channel per plugin's audio input (plugin's port
> And how does ecasound handles this? Does it use as many instances of a
> mono plugin as there is chanels in the file?

Ecasound uses a two-stage approach. First it does exactly the same as
applyplugin, it checks whether num_of_plugin_inputs matches
num_of_chain_channels, and if it does, creates one plugin (this way you
can take advantage of stereo plugins, etc). If this fails and the plugin
only has one audio input (=mono), ecasound creates a separate plugin
instance for each chain channel. In other cases, you'll get an error.

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