'create measure from time selection' - working with audio but not midi?

[Mudchild]

Am I doing something wrong? I snip a bit of audio, set the locators round it, and hit 'create measure from time selection' - presto, I have a new loop on the grid, with a new tempo created for it.

Try the same with a bit of MIDI and it just doesn't work properly - the MIDI gets re-sized in what seems to be an unpredictable fashion.

Any clues?

[Diogenes]

Maybe a project timebase thing?

D

[Mudchild]

not as far as I can tell - using 'Beats (position only)' and 'Beats' as these options... and why would MIDI be behaving different from audio?

(would be happy to be proved wrong though)

[EricM]

It's an issue with Reaper's MIDI timebase implementation, as MIDI
doesn't follow its own grid but insists on being tied to project,
unless you manually define the MIDI item's internal tempo in
properties, which is a constant value of course, and cannot have
changes.

It's a long standing problem, but devs seem to feel this is how it
should behave (or would probably require a thorough overhaul
on this part before properly implementing it).

e

[Mudchild]

right. still not sure how this leads to resizing of the MIDI clips in my example, but I'll take your word for it. Shame!

[EricM]

Originally Posted by Mudchild

right. still not sure how this leads to resizing of the MIDI clips in my example, but I'll take your word for it. Shame!

The function changes project tempo -> midi follows the new
tempo and stretches accordingly as if it was in Beats (Position
and Length) mode.

e

[Mudchild]

ah ok. Any workarounds?

[moliere]

*sorry tried it, doesn't work*

actually, try F2 on the midi item, change the timebase on the item itself to time, and then do the 'detect' thing. looks like it works

[Breeder]

Originally Posted by Mudchild

ah ok. Any workarounds?

Just ignore project tempo for MIDI item (right click the item and select Source properties...), create needed tempo changes and once done glue MIDI item to "embed" tempo into it.

[Mudchild]

Originally Posted by moliere

*sorry tried it, doesn't work*

actually, try F2 on the midi item, change the timebase on the item itself to time, and then do the 'detect' thing. looks like it works

sorry, what is the 'detect' thing?

[Mudchild]

Originally Posted by Breeder

Just ignore project tempo for MIDI item (right click the item and select Source properties...), create needed tempo changes and once done glue MIDI item to "embed" tempo into it.

this may work, but it's not the situation I'm after... i need to be able to quickly create a new tempo grid that sticks straight around a piece of MIDI that was played in freely, to no click... without stretching or changing the tempo of the MIDI clip itself.

[Breeder]

Originally Posted by Mudchild

this may work, but it's not the situation I'm after... i need to be able to quickly create a new tempo grid that sticks straight around a piece of MIDI that was played in freely, to no click... without stretching or changing the tempo of the MIDI clip itself.

Hm...I don't see how above advice may not work? Ignoring project tempo (and setting it to a tempo at which MIDI item is currently) will do exactly that - not let MIDI item stretch and enable you to put tempo changes where needed.

[Mudchild]

Uhuh, but the point of the exercise is that I don't actually know the tempo of the MIDI item. I want Reaper to work it out for me (it is likely to be 107.691 bpm or something equally silly, as it was played freely), and stick it to a grid with that tempo.

This is not what you're describing (unless I'm misundertanding?)

[Breeder]

Originally Posted by Mudchild

Uhuh, but the point of the exercise is that I don't actually know the tempo of the MIDI item. I want Reaper to work it out for me (it is likely to be 107.691 bpm or something equally silly, as it was played freely), and stick it to a grid with that tempo.

This is not what you're describing (unless I'm misundertanding?)

That's exactly what I'm describing. You first make MIDI item not get stretched by tempo changes and then you tempo map it (because Reaper can't make it out for you, you need to do it manually)

http://wiki.cockos.com/wiki/index.ph...pping_with_SWS

[Mudchild]

Originally Posted by Breeder

That's exactly what I'm describing. You first make MIDI item not get stretched by tempo changes and then you tempo map it (because Reaper can't make it out for you, you need to do it manually)

http://wiki.cockos.com/wiki/index.ph...pping_with_SWS

Ah right, a whole new ball game! OK thanks, I will check this out

[moliere]

Originally Posted by Mudchild

sorry, what is the 'detect' thing?

I meant 'measure from time selection' sorry, it's called 'measure from time selection (detect tempo)' in the menu.