Edirol Sd-90 Soundfont: Hot!

Note: Before reading, it is critical to understand that the EDIROL SD-90 (by Roland) does not use SoundFont (.sf2) files natively. This report clarifies the hardware capabilities, the common confusion, and the workflow required to use SoundFonts with this unit.

6. Legacy and Cult Status

Today, the SD-90 is a forgotten footnote, largely because of driver obsolescence (no modern macOS or Windows 11 drivers exist). However, it has a passionate cult following among:

• Video Game Composers of the 2000s: Many early PS2 and Xbox game soundtracks used SD-90 SoundFonts for placeholder sounds that ultimately made it into the final mix.
• The "Vaporwave" and "Broken Circuits" Scene: Modern electronic musicians seek out the SD-90 for its specific aliasing artifacts when converting high-resolution samples to its internal 16-bit/44.1kHz engine.
• Legacy DAW Archivists: Studios attempting to resurrect sessions from 2003-era Digital Performer or Cubase VST rely on the SD-90 to recall custom sample maps that no software sampler can read natively.

4. Workflow: Using SoundFonts WITH the SD-90

To use SoundFont .sf2 libraries through the SD-90, you must use a host computer (Windows/macOS) to convert/play the SoundFont, then route the audio back to the SD-90. edirol sd-90 soundfont

2. The General MIDI Standard

• File: FluidR3_GM.sf2 (approx. 14MB)
• Why: FluidR3 is the gold standard for clean, realistic General MIDI. On the SD-90, the piano, strings, and brass become shockingly playable for a 2001 rack unit.

2. Hardware Specifications (Relevant to Sampling)

| Feature | Specification | | :--- | :--- | | Synthesis Type | Roland GS (General Standard) + PCM sample playback | | Polyphony | 64 voices | | Preset ROM | 1,058 waveforms (1,435 including rhythm sets) | | User Memory | None for sample loading | | Expansion | None (no SR-JV80 slots, unlike older Roland modules) | | Connectivity | USB 1.1, MIDI I/O, S/P DIF, Analog I/O |

3. The Sonic Character: Why the SD-90 Sounded Different

A SoundFont loaded into an SD-90 did not sound identical to the same SoundFont loaded into a Creative Sound Blaster Live! or an E-mu APS card. Note: Before reading, it is critical to understand

• DAC Quality: The SD-90 used AKM (Asahi Kasei Microdevices) converters, which were vastly superior to the noisy, jitter-prone converters on consumer Sound Blaster cards. Consequently, SD-90 SoundFonts exhibited a darker, more defined low-end and a non-fatiguing high-frequency roll-off.
• Interpolation: While the Sound Blaster used a primitive linear interpolation algorithm (leading to aliasing at high pitches), the SD-90 utilized a proprietary Roland interpolation filter. This gave custom samples a "smoothed" quality, eliminating the "zipper noise" typical of cheap wavetable cards.
• The "Roland Shimmer": Users noted that even third-party SoundFonts took on a subtle harmonic sheen when played through the SD-90’s output stage, likely due to analog output buffer design.

7. Recommendations

• If you own an SD-90 and want to play SoundFonts:
  Use it as a high-quality audio interface and MIDI controller, but run the SoundFonts on a computer (using free software like FluidSynth or Bismark bs-16i on iPad). Route the computer’s audio output to the SD-90’s line inputs.

• If you want a hardware SoundFont player:
  Sell the SD-90 and buy: Video Game Composers of the 2000s: Many early

  • Creative SoundBlaster Live!/Audigy (PCI, with .sf2 RAM)
  • EMU Proteus 2000 (with Command Station)
  • Roland JV/XV series (with SR-JV80-02 Orchestral – not SoundFont, but similar concept)
  • Akai S series (native .akp, but converts .sf2)

• If you want native Roland synthesis:
  Keep the SD-90. Its internal 1,058 waveforms are excellent (better than most free SoundFonts), especially for acoustic emulations (brass, guitar, drums).