Subject:Event Marking

Posted by: oddboy

Date:11/2/2002 8:01:38 PM

Im looking at some demo projects and wondering Why some events have % on them and some dont.

Like one event will say +2 A# and one will say -7 -33% -Whats the difference

Subject:RE: Event Marking

Reply by: Iacobus

Date:11/3/2002 3:41:09 PM

You're pitch shifting either a Loop or a One-shot.

"+2 A#" means you are pitch shifting an ACIDized loop 2 semitones above the original key, to A sharp. (From the original project's key of G Sharp, which is actually A Flat Major; it's a long story.)

"-7 33%" means you are pitch shifting a One-shot 7 steps below, effectively stretching it to about 33% of the original. It does not mean you are stretching the event to a different key, but rather to a different timbre, since One-shots typically have no definite pitch to begin with (which is why they're typically used for percussion samples).

HTH,
Iacobus

Subject:RE: Event Marking

Reply by: oddboy

Date:11/3/2002 4:58:42 PM

"You're pitch shifting either a Loop or a One-shot."

What about beatmapped? That would be just like the loop?

"+2 A#" means you are pitch shifting an ACIDized loop 2 semitones above the original key, to A sharp. (From the original project's key of G Sharp, which is actually A Flat Major; it's a long story.)"

So if project is A and loop is D, the loop will play in A when dragged into project.
And 2 semitones up on the event would simply be two semitones up from A-not D, making the fact that the original loop was in D irrelevant except for quality concerns surrounding overstretching

"-7 33%" means you are pitch shifting a One-shot 7 steps below, effectively stretching it to about 33% of the original. It does not mean you are stretching the event to a different key, but rather to a different timbre, since One-shots typically have no definite pitch to begin with (which is why they're typically used for percussion samples).

So a one shot that is not a percussion instrument does have a pitch just not one defined in the track properties? If I knew that a bass lick was in F and bring it in as a oneshot it will play out of key if the project is set to A? Unless I open track properties and click transpose to A on the F track.

Subject:RE: Event Marking

Reply by: Iacobus

Date:11/3/2002 8:46:41 PM

-A Beatmapped track can be pitch shifted. Note that, by default, if the tempo changes, then the pitch of the Beatmapped track will raise or lower accordingly and you can't adjust the pitch of an event. If you check the Preserve pitch when stretching option under the Beatmapped track's properties, you'll then be able to change the pitch of the track at will.

-Correct on the "+2 A#" part.

-That's correct on the first part of the question. You cannot, however, transpose something like a bass lick that's in F to A when it comes to One-shots. (There's no Stretching tab in a One-shot track's properties.) ACID is basically assuming you know what you're doing as far as the One-shot is concerned.

Again, the only stretching that's done is to a different timbre, so if a sample is "-7 33%", it means that the One-shot will playback at 33% of the original, which will slow it down. It's like using a record player at a different speed. (Interestingly, you could use such a technique for creative purposes.)

HTH,
Iacobus

Subject:RE: Event Marking

Reply by: oddboy

Date:11/4/2002 3:27:37 AM

Thanks... Im getting close to understanding this stuff.

Ill give another real world example thas baffling me.

It centers around me not understanding the relationship between the file-the "track properties"in Acid-and the Project Key.

My project key is set to none
I have a one measure sustaining cello loop my friend recorded at A
I select it in explorer
It reads: Audio Loop 16 beats at 95 BPM, root note none, 44khz 24 bit (these are the setting acid derives without even having set acid propertie- or the properties if they have been set?)

Then I create a track with the loop.
Since its set to dont transpose, the loop plays back noramlly-at A
If I go to the track properties and change it to B nothing happens.
Then If I change the project key to B the loop plays back in A.

Then if I start to change the root note or the project key i get lost as to what is going on.

Subject:RE: Event Marking

Reply by: Iacobus

Date:11/4/2002 2:33:35 PM

Correct. ACID is only guessing about the cello loop unless you've already specified them using something like the ACID Loop Creation Tools in Sound Forge.

Since you're adding a loop that has no root, it's not going to change with the rest of the project, even if you change the project's key.

If you go into the track's properties once the loop is added to the project and change it to B, you're now in the process of ACIDizing the loop. Now that the loop's root note is now B, changing the project's key to B should not change the way the loop sounds, since you've specified it's root note as B to begin with.

If you change the project's key to A at that point, the loop should now also play in A. That's what should happen in your case. (More info on ACIDizing loops using ACID can be found here.)

HTH,
Iacobus

Subject:RE: Event Marking

Reply by: oddboy

Date:11/4/2002 3:19:41 PM

One more question please , But what happens if i set the loop in the properties to something other than what it is?

If I set the A loop to G and set the Project Key to B- the loop will play in B? but will loose qaulity because acid is using my incorrect G reference to conform the actual a loop to the Project Key of B?

Subject:RE: Event Marking

Reply by: Iacobus

Date:11/5/2002 1:45:29 PM

Correct. It won't exactly lose quality but will more than likely be out of tune, since the correct reference note isn't being used (which is why it's important to correctly identify the root note before ACIDizing; Sound Forge is pretty good at analyzing a waveform via the Spectrum Analysis tool).

Iacobus