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OB-1 0.5

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@simonjohansson simonjohansson released this 19 Oct 18:02
ob1-v0.5
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User-visible changes since ob1-v0.4.

Controls and playing

  • Two SRC pages with fifteen controls. Press SRC to switch between oscillator controls and mixer/routing. Each oscillator has its own row on the first page.
  • Independent coarse and fine tuning. Tune each oscillator relative to the played note, from −32 to +31 semitones, with an additional −50 to +50 cents of fine tuning.
  • Separate waveform family and shape. Choose SAW or PULS with TYP1/TYP2, then sweep WAV1/WAV2 within that family without accidentally switching between saw and pulse.
  • Separate mixer and routing controls. Each oscillator's fundamental and sub-octave now has its own OFF / −3 dB / ON control. SYNC and XMOD have independent switches. Mixer levels appear as vertical three-position switches, and waveform previews follow the selected family and shape, including held-step locks.
  • MIDI access to all fifteen SRC controls. CC 16–30 cover both pages, including the separate mixer, sync and cross-modulation controls.
  • MIDI voice reset. CC 9, with any value, resets the addressed OB-1 track's oscillator and noise state without changing its sound settings. It does not retrigger the track's amp envelope or reset filters/effects; resetting a sounding voice can click.

Sound

  • Continuous oscillators while a note is active. Muting an oscillator's output no longer freezes its phase or disables selected sync/cross-modulation paths. Bringing it back into the mix preserves its ongoing phase. Fully silent voices can still pause.
  • More accurate tuning, especially in the low register. Improved pitch precision follows standard A4 = 440 Hz tuning.
  • Revised upper-register response and noise balance. High-pitched oscillator output becomes progressively quieter, the output has a gentler high-frequency response, and noise level/spectrum more closely follows the reference plugin. This is a partial reference match, not a claim of complete hardware or plugin fidelity.
  • A slightly detuned init patch. Newly selected OB-1 machines start with FIN2 at +2.4 cents to keep unison phase cancellation moving. Set FIN2 to +0.0 for exact unison. Loaded sounds retain their stored tuning.

Compatibility

The new parameter layout is a breaking change: older OB-1 sounds, parameter locks and LFO assignments are not migrated and need to be recreated or reassigned. Newly saved sounds use the version-4 sound format and require compatible custom firmware to reload.

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