- Pitch modulation
- A built in noise generator, useful for hi-hats, cymbals, rides, effects, among other things
- Per-channel echo, which unfortunately eats up a lot of memory but can be used to save channels in songs
- An 8-tap FIR filter for the echo, which is basically a procedural low-pass filter that you can edit however you want
- Sample loop, but the loop points have to be multiples of 16
- Left/right channel invert for surround sound
- ADSR and gain envelope modes
- 7-bit volume per channel
- Sample interpolation, which is basically a low-pass filter that gets affected by the pitch of the channel
Effects
10xx: Set waveform.11xx: Toggle noise mode.12xx: Toggle echo on this channel.13xx: Toggle pitch modulation. Frequency modulation by the previous channel’s output. No effect on channel 1.14xy: Toggle inverting the left or right channels.xis left,yis right.15xx: Set envelope mode. See gain chart below for1through5.0: ADSR mode.1: Gain (direct). Volume holds at one level.2: Linear decrement. Volume lowers by subtractions of 1/64.3: Exponential decrement. Volume lowers by multiplications of 255/256.4: Linear increment. Volume rises by additions of 1/64.5: Bent line (inverse log) increment. Volume rises by additions of 1/64 until 3/4, then additions of 1/256.
16xx: Set gain.00to7Fif direct,00to1Fotherwise.18xx: Enable echo buffer.19xx: Set echo delay. Range is0toF.1Axx: Set left echo channel volume.1Bxx: Set right echo channel volume.1Cxx: Set echo feedback.- All of these are signed numbers.
00to7Ffor 0 to 127.80toFFfor -128 to -1.- Setting these to -128 is not recommended as it may cause echo output to overflow and therefore click.
1Dxx: Set noise generator frequency. Range is00to1F. See noise frequencies chart below.1Exx: Set left dry / global volume.1Fxx: Set right dry / global volume.- These do not affect echo.
20xx: Set attack. Range is0toF.21xx: Set decay. Range is0to7.22xx: Set sustain. Range is0to7.23xx: Set release. Range is00to1F.- These four are only used in ADSR envelope mode. See ADSR chart below.
3xyy: Set echo filter coefficient.xis the coefficient from 0 to 7.yyis the value (signed number).00to7Ffor 0 to 127.80toFFfor -128 to -1.
- Note: Be sure the sum of all coefficients is between -128 and 127. Sums outside that may result in overflow and therefore clicking.
Info
When two channels are joined for pitch modulation, the channel bar will showmod on a bracket tying them together.
When using sample offset commands, be sure to open each involved sample in the sample editor, look to the “Info” section at the top-left, and check the “no BRR filters” box. This prevents sound glitches, at the cost of lowering the sample quality to 4-bit.
Chip Configuration
The following options are available in the Chip Manager window:- Volume scale: Scale volumes to prevent clipping/distortion.
- Enable echo: Enables the echo buffer.
- Initial echo state: Selects which channels will have echo applied.
- Delay: Sets echo length.
- Feedback: Sets how much of the echo output will be fed back into the buffer.
- Echo volume: Sets echo volume.
- Echo filter: Adjusts echo filter.
- Dec/Hex: Toggles decimal or hexadecimal mode for the filter settings text entry box to the right.
- Disable Gaussian interpolation: Removes sample interpolation, resulting in crisper but aliased sound. Not accurate to hardware.
- Anti-click: Reduces clicks in the output by using hardware envelopes to smooth them out.
- Make sure your samples start on center, or else you will still hear clicks.