Propellerhead Reason - 1.0.1 Betriebshandbuch PDF herunterladen (Seite 65)

SYNCHRONIZATION

Synchronization

Considerations

Adjusting for Latency

Latency compensation (MacOS version)

Because of the latency problem described on page 194, you might need to

adjust Reason’s playback in relation to the sync master, so that they are in

perfect time. The tempo will not differ between the two, but Reason might

play ahead or behind the other application. You might need to adjust this.

However, this is something you only need to do once. The setting is stored

with your other preferences, so you don’t need to adjust it again.

Proceed as follows:

1. Set up the other application so that it generates a solid click, on for

example quarter or eighth notes, preferably with a special sound on

the downbeat.

This click can either come from an internal metronome or from a MIDI

source. If you use a MIDI source, make sure you pick one that has solid

MIDI timing.

2. Set up Reason so that it plays a similar rhythm as the other applica-

tion.

You might for example use the Metronome or Redrum drum computer for

this.

3. Start the two applications in sync.

4. Make sure you hear both applications at approximately equal level.

5. Open the Preferences dialog in Reason and select the Audio page.

6. Trim the “Latency compensation” setting until the “clicks” from the

both sources sound at exactly the same time.

7. Close the Preferences dialog in Reason.

If Latency Compensation isn’t enough

There might be situation s where you can’t compensate enough in Reason to

make two software applications run in sync. This might especially be true if

the other application is an audio sequencer, that is if it can both record and

playback audio and MIDI.

This problem an indication to the fact that the other application has not been

set up properly and that its audio playback is not in sync with its own MIDI

playback.

! This is not something that you can or should compensate for in

Reason. Instead, follow the instruction included with the other ap-

plication to make sure its MIDI playback and audio playback or cor-

rectly locked to each other.

About the beginning of the Song

Due to the latency phenomenon, described on page 194, Reason needs

some time to correct it’s playback speed when it first receives the Start com-

mand. This can be noted as a small glitch in the audio playback, when the

program starts. If this is a problem, you need to insert a couple of empty

measures at the beginning of the Song. Proceed as follows:

1. Set the Left Locator to “1 1 1” and the right Locator to “3 1 1“.

2. Click somewhere in the main sequencer area to move the menu fo-

cus to the sequencer.

3. Select “Insert Bars Between Locators” from the Edit menu.

4. Set up the other device/application, so that it also plays two empty

bars at the beginning.

About MIDI Song Position Pointers

MIDI Clock actually consists of five type of messages: The actual clock (the

metronome that establishes the tempo), Start, Stop and Continue commands

and Song Position Pointers. This last type of message contains information

about positions, so that a program for example “knows” where in a Song to

start playback from.

Normally, this ensures that you can locate to any position and activate play-

back from there. In older devices, Song Position Pointers might not be imple-

mented. This means that you will be able to synchronize properly only if you

start both devices from the absolute beginning of the song.

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