Need help with Stretch MIDI Clips

Many years ago Cakewalk had a percent parameter that affected all tempos in a MIDI file. It was a great feature for someone who played along with accompaniment files and liked to gradually increase song tempo.

I guess the replacement for this feature is the new "Stretch MIDI clips" feature. The doc says there are three methods for this, but only the Timing tool method works for me. (With the Smart tool method, Sonar thinks I want to copy.)

According to the doc,"With the Timing tool, position the pointer over the clip’s first half and drag to stretch the beginning, or position the pointer over the clip’s second half and drag to stretch the end."

Each track has a single clip, and I've set the edit filters to Clips. Even though I've selected all three tracks, the operation applies to only one at a time. I stretch each track out to 120%, but the result is that the "120%" isn't precise enough and it leaves the tracks out of sync.

Any suggestions?

Mitch I.

Sonar Platinum Gloucester running on 64-bit Windows 7

Kylotan,
 
Thanks for the input.
 
This file has several tempo changes. Changing the initial tempo only applies until the first tempo change. I could do some arithmetic and change the tempo proportionally at each change. But I'll probably need to change the tempo of the whole song several times until I settle on one.
 
Mitch I.

Mitch_I
Many years ago Cakewalk had a percent parameter that affected all tempos in a MIDI file. It was a great feature for someone who played along with accompaniment files and liked to gradually increase song tempo.

I guess the replacement for this feature is the new "Stretch MIDI clips" feature. The doc says there are three methods for this, but only the Timing tool method works for me. (With the Smart tool method, Sonar thinks I want to copy.)

According to the doc,"With the Timing tool, position the pointer over the clip’s first half and drag to stretch the beginning, or position the pointer over the clip’s second half and drag to stretch the end."

Each track has a single clip, and I've set the edit filters to Clips. Even though I've selected all three tracks, the operation applies to only one at a time. I stretch each track out to 120%, but the result is that the "120%" isn't precise enough and it leaves the tracks out of sync.

Any suggestions?

 
Mitch,
  The Process > Length... menu option will stretch or shrink clips by percent and will process all selected clips at the same time.  If you are looking for a specific target effective tempo, then you will need to calculate the percent by dividing the current tempo by the new tempo.  For example, current tempo is 100 and I want an effective tempo of 110, then 100/110 = 0.909 which translates to 91%.   I tried it with a project that had multiple tempo changes and all tracks remained in sync.
 
-- Ron

If the clips are already in sync with the timeline, and the project has tempo changes, stretching clips is just going to foul things up. The Tempo Offset buttons went away because they were only compatible with pure MIDI projects using direct-monitored hardware synths. Having any audio in the project, including the audio metronome would disable them.
 
SONAR does not have a built-in function for scaling a tempo map. Below is a workaround I've posted before. It's awkward because you have to work in SMPTE time. Also you should avoid trying to scale only part of the project; IIRC, there are issues with the way SONAR handles that.
 
1. Enable autostretch (a.k.a. Clip Follows Project) on any audio clips.
2. Select a MIDI or audio clip that runs the length of the project.  
3. Go to Process > Fit to Time.  
4. Convert the current Thru time to total frames.  
5. Divide that by the desired factor (e.g. 1.10 to get a 10% increase, 0.90 for a 10% decease).  
6. Round and convert that new value to minutes:seconds:frames.  
7. Enter that as the new Thru, and select Modify by Changing: Tempo Map.  
8. Click OK.