Re:I Need A Reminder - How to extract a MIDI groove?
2011/04/03 12:43:05
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Extracting MIDI timing information from audio allows you to:
● Double an audio rhythm with a MIDI instrument.
● Replace sounds in an audio clip (commonly used for drum replacement).
● Notate the rhythm of an audio clip.
● Align lyrics with an audio rhythm.
After you extract the timing information from an audio clip, the timing information is copied to the clipboard as MIDI note events. You can paste the MIDI notes to a new MIDI track or use the clipboard as a source for the Groove Quantize command.
To extract MIDI timing from an audio clip
1. Press SHIFT+A to open the AudioSnap palette.
2. Select the audio clip whose rhythm you want to extract.
3. Do any necessary quantizing, and disable any transient markers that you don’t want to extract (see Quantizing audio and To disable a transient marker).
4. With the clip still selected, click the AudioSnap Options button in the AudioSnap palette to open the AudioSnap Options dialog.
5. In the Convert to MIDI Note box, choose C3. This is the note most drum synths use for the bass drum. If your favorite synth uses a different note, choose it now.
6. Choose a Note Velocities option: either accept the extrapolated velocities in the audio clip (the Vary With Pulse Level option), or set a constant velocity for the notes in the Set All To Same Value field.
7. Click OK to close the AudioSnap Options dialog.
8. Click the Copy As MIDI button .
This adds the extracted groove to the Windows clipboard.
SONAR copies the audio rhythm to the Clipboard as a MIDI clip, with the same pitch assigned to each note.
You can now paste the MIDI notes to a new MIDI track, use the clipboard as a source for the Groove Quantize command, or save the extracted groove as a Groove Quantize file.
To paste the extracted MIDI timing to a MIDI track
1. Click the track number of a MIDI track to select it.
2. Move the Now Time to the measure where you want the data (we’ll use measure 1).
Tip: If you want the MIDI notes to align perfectly with the audio data, press F7 to move the Now time to the beginning of the selected audio clip.
3. Press CTRL+V to paste the data.
A new MIDI clip is inserted in the track
Note: All the new MIDI notes have the same pitch, and the tails of the preceding notes reach all the way to the following notes, so you can’t see the actual rhythm. You can easily shorten the duration of each note event in order to clearly see each note event. To do so, click Process > Length to open the Length dialog. In the Length dialog, disable the Start Times check box, enable the Duration check box, and type 50 in the Percent field. Click OK to close the dialog. Then click the PRV Mode button in the MIDI track (you can see the rhythm if you enable the Inline Piano Roll view and zoom in).