. Audio, PC

  1. How do I set the record delay and playback delay for MME drivers?
  2. CPU Too Slow Message
  3. I get messages "Disk or CPU too slow"
  4. LAW Digital Noise with Yamaha DSP Factory

.1 How do I set the record delay and playback delay for MME drivers?

  1. Make a MIDI Sequence with a click sound at e.g. bar 4.
  2. Record the audible result via audio. Open the recorded file in the Sample Editor and check the distance of the first signal appearance to bar 4 to get the recording delay. E.g. if the signal is 400 samples too late, set RecDelay to -9 ms (1 ms = 44.1 samples with a 44.1 k sampling rate).
  3. Place the anchor at the start point of your audio to place it manually at bar 4.
  4. Pan you audio to hard left and MIDI to hard right.
  5. Play back and record both onto a new track. Open the recorded file in the Sample Editor and check the distance between both signals to get the Playback Delay. E.g. if the re-recorded audio is 200 samples too early, enter (+) 5 (ms) at PlayDelay.

That's all and takes only 1 or 2 minutes...

Note: For a more accurate treatment of the general problem of setting record/playback delay, see the question "How do I set-up record / playback / monitoring delay?" in the chapter on "Audio, both platforms" of this FAQ.

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.2 CPU Too Slow Message

It has to do with the option in LAPW:

Options > Settings > MIDI Options > Transmit MIDI Clock

I had the box there checked and under it was "All Ports." I have a MTP AV linked to a MTP II. All I simply had to do was change that option from "All Ports" to "MTPAV Out All."

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.3 I get messages "Disk or CPU too slow"

Make sure that your sound card isn't sharing an IRQ with any other device. It has to have one of its own. 

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.4 LAW Digital Noise with Yamaha DSP Factory

Question: I'm still experiencing both bursts of digital noise at the ends of audio regions, and also sustained digital noise that forces me to leap across the desk to turn off the power amp, and then force-quite Logic and restart. Yamaha DSP Factory (2416 & AX44)

Answer: Early revs of the DSP Factory have this problem, which is apparently related to overheating/additional current being sent to the card -- hence the inconsistency of the bursts of noise. When you start/stop the card, via LAW, it's reasonably safe to assume that the amount of current sent to the card changes. (This is an educated guess, not a statement of fact ;-))

There is a hardware modification which can be done by Yamaha which should be free-of-charge, but may not be with your local distributor -- check it out.

To see if your card has/has not been modified, take a look at the underside for a "white (or coloured) glob of goo" (Yamaha tech's words, not mine ;-)) with a small wire patched between components. Even if it has, it may still be worthwhile talking to Yamaha about this as they may have updated the patch/procedure.

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