Re: Bug? Clicks while recording audio (In) from MIDI (out)
Re: Bug? Clicks while recording audio (In) from MIDI (out)
- Subject: Re: Bug? Clicks while recording audio (In) from MIDI (out)
- From: Doug Wyatt <email@hidden>
- Date: Mon, 24 Feb 2003 10:24:41 -0800
On Saturday, Feb 22, 2003, at 13:47 US/Pacific, Josh Whitver wrote:
My theory is that it's purely a software issue, ie, there's something
in the
audio-in code of CoreAudio that winces whenever the CoreMIDI aspect of
CoreAudio is busy. So, whenever there's a MIDI event, CoreAudio's
Audio In
just hiccups.
Any time I've heard CoreAudio hiccups it's much more dramatic effect
than what's in your audio file, major dropouts.
Yes, but it's the last model that had analog audio-in. Also, like I
mentioned above, I'm operating under the assumption that it's a purely
software-related issue (the audio is actually coming in crystal-clear,
but
CoreAudio just can't handle listening to the audio-input port while
it's
busy sending MIDI data out).
An interesting avenue of investigation would be to see if the noise,
when analyzed in a sample editor, has a regular mathematical pattern.
If so, then the interference is happening in the digital (i.e.
software) domain. If the noise is jagged and irregular, then it's
definitely coming from the analog (i.e. hardware) domain.
Why assume? Please investigate as I suggested.
I'd do it myself if I could reproduce it, but I can't. Or you can send
me a short AIFF (not MP3, we don't want encoding artifacts) of the
noise.
Doug
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