M-Audio 37-Key Audio/MIDI Interface and Controller Ozonic Instrukcja Użytkownika Pobierz pdf (Strona 6)

Monitoring Latency and MIDI

To monitor a MIDI device through the audio inputs on the Digi 001, you need to route

each input to a track and record-enable that track before you will hear any output. This is

another reason why it is useful to use a separate external mixer with the Digi 001—so

you can always hear your synths, drum-machines, and samplers without setting up

routings in the Pro Tools software.

Also, when you are monitoring the audio coming into the Digi 001 from an external

synthesizer, what you hear will have an audio delay equivalent to the number of samples

specified in your Hardware Buffer settings—the latency delay. This delay will be very

apparent if you have existing audio tracks, as these will be heard first and the MIDI

devices will be heard a little later. If you don’t have an external mixer, you will have to

accept this latency while recording MIDI.

But there is a way around this for playback—use the Global MIDI Playback Offset

feature in Pro Tools LE’s MIDI Preferences to trigger your MIDI data early to

compensate for the latency. This offset is made in such a way that it just affects the

playback—not the way the MIDI data is displayed in the Edit window. You are given the

choice of offsetting the MIDI tracks either globally (all by the same amount) or

individually. To compensate for audio monitoring latency, you will need to enter a

negative offset that causes the MIDI data to be played back earlier by a number of

samples equivalent to the latency in samples. The best way to work out which latency

value to use is to record the audio from your MIDI device into Pro Tools, and then simply

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M-Audio 37-Key Audio/MIDI Interface and Controller Ozonic Instrukcja Użytkownika Strona 6