- Amiga: maximum frequency is 31469Hz, but anything over 28867 will sound glitchy on hardware. sample lengths and loop will be set to an even number, and your sample can't be longer than 131070.
you can actually tweak your samples in Furnace's sample editor, which can be accessed by clicking on `window` (at the top of the screen) then clicking on `sample editor`.
the changes you make will be applied as soon as you've committed them to your sample, but they can be undone and redone, just like text.
- **BRR emphasis**: boosts higher frequencies to compensate for the SNES low-pass filter. should not be enabled for BRR-type samples. only appears when applicable.
- **8-bit dither**: applies dithering to samples meant to play back at 8-bit resolution. only appears when applicable.
- **Loop**: enable or disable sample loop. only on supported chips.
- **Mode**: direction of loop. backward and ping pong loops are only natively available on some chips; on others, loop will be automatically unrolled as needed.
- **Edit mode: Select**: cursor selects portion of sample.
- **Edit mode: Draw**: cursor draws over wave.
- **Resize**: stretches sample. pops up a dialog to type new length.
- **Resample**: stretches sample. pops up a dialog box:
- **Rate**: new sample rate.
- **0.5x**: halves sample rate.
- **==**: returns to original sample rate.
- **2.0x**: doubles sample rate.
- **Factor**: multiplier of original sample rate.
- **Filter**: selects interpolation filter for resampling.
- **Undo**: undoes previous edit.
- **Redo**: redoes undone edit.
- **Amplify**: changes amplitude of selection. pops up a dialog to type amount.
- **Normalize**: adjusts amplitude of selection to maximum without clipping.
- **Fade in**: ramp amplitude of selection from 0 to original.
- **Fade in**: ramp amplitude of selection from original to 0.
- **Insert silence**: inserts silence. pops up a dialog to type length.
- **Apply silence**: reduces amplitude of selection to 0.
- **Delete**: removes selection.
- **Trim**: removes all but selection.
- **Reverse**: reverses direction of selection.
- **Invert**: flips selection "vertically".
- **Signed/unsigned exchange**: reinterprets selection data as being of the opposite sign. if a sample sounds fine elsewhere but is distorted on import, it may have been interpreted as signed when it should be unsigned, or vice versa; this will correct that.
- **Apply filter**: filters the selection. pops up a dialog box:
- **From**: filter cutoff frequency at start of selection.
- **To**: filter cutoff frequency at end of selection.
- **Resonance**: emphasizes frequencies around filter cutoff.
- **Power**: number of times resonance is applied.
- **Low-pass**: amount to attenuate everything above cutoff.
- **Band-pass**: amount to attenuate everything outside cutoff.
- **High-pass**: amount to attenuate everything below cutoff.
- **Preview sample**: plays sample at base frequency.
- **Stop sample preview**: stops preview.
- **Create instrument from sample**: creates a new instrument with its initial sample set to the current sample.
- **Zoom**: shows and sets sample view zoom level.
- **Zoom mode**: switches between "Auto" (entire sample fits in window) and "100%" (each horizontal pixel represents one sample point).
