Under Construction

04.13 Finding A Loop Without Glitches

The following options in the Preferences dialogue matter when it's about finding a decent loop for your sample:


Depending on the diminuition factor, the scope of one pixel on the Atari screen may enclose many sample frames:

In the example above there's a diminuition factor of 8, thus 1 pixel encloses 8 sample frames, indexed here from 0 to 7. The example visualises the values of these 8 sample frames as vertical bars ranging from -32768 to +32767.

The following rule you choose in the Preferences dialogue applies to selecting the right locator (at:) in the Sample Editor:

  • So in the Preferences dialogue choosing the first option of the 3 radio buttons labeled as "select first frame" will obviously select frame #0 in the example.
  • Choosing "select frame with minimum value" (it actually should say: "frame with minimum absolute value") will select frame #2 in the example.
  • Choosing "select frame with maximum value" (it actually should say: "frame with maximum absolute value") will select frame #4 in the example as its negative peak is more extreme than frame #3 is on the positive side of things.

The Find Equal Amplitude Function

The "Find Equal Amplitude"-function from the pulldown menu (or clicking the magnifying glass in the Toolbox window or pressing [Ctrl] + [F] on the keyboard) will find a left loop point with a sample value aproximately equal to the value of the right locator starting from the left going rightwards considered you have spanned up a complete loop. You can keep executing the Find function until the loop length becomes 0.

The parameter in the Preferences dialogue labelled as "FIND: delta(L, R)" defines how big the difference between the left and the right locator values may get when finding a left loop point.

A Strategy To Glitch-Free Loops

In the Preferences dialogue you choose the option "select frame with minimum value". When defining your right locator in the Sample Editor window, click a pixel with an obvious peak sample value considered you have diminuised the sample to a bit. Now within the scope of one pixel the frame with the minimum sample value is selected.
Now span up a loop slightly longer than you want it to be. When you press [Ctrl] + [F] now, decent loops should be found.

Mind:

The FIND function of AKAINOID doesn't deliver the same results as the FIND function on your Akai itself.