[linux-audio-user] Re: latencies

Wolfgang Lonien wolfgang at lonien.de
Mon Jul 25 14:21:47 EDT 2005


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Clemens Ladisch wrote:
> Wolfgang Lonien wrote:
> 
>>>Do the lags occur when you connect the MIDI input port directly to the
>>>output with aconnect?

> I meant the input from the keyboard and the output to the SC.

No lags/delays in that case. The Midisport interface has some hardware
MIDI-through switch, and it doesn't matter if I go directly
keyboard--->synthesizer or via USB bus - no lags, no delays. Only when
software (like Rosegarden) wants to play/record in the game, I have
horrible lags...

> I guess you're recording the output of some software synthesizer?

No - no audio recording on my side, only MIDI events...

> Recording of either MIDI or the output of the SC shouldn't make any
> problems.

Until now, I didn't connect the SC's audio out back to the laptop. That
one goes directly into a stereo set... (amplifier/speakers)

> What synthesizer do you use?  How it is configured?

The Roland Sound Canvas SC-33, an older "instrument" (according to
today's standards, maybe not much more than a stand-alone external sound
card). It's configured to receive MIDI, nothing else...

cheers,
wjl
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