Two new operating systems for the E-mu Emulator II and II+ in one download. The SP12 sampling OS keeps everything you know from OS 3.1 and adds lo-fi sample rates, the full keyboard range and snappier envelopes. EIIFX turns the sample input into a live effect running through the EII’s 8-bit companding converters and its analog SSM2045 filter.
SP12 sampling OS
- Record at 27.8, 13.9, 6.9 or 3.5 kHz (slider B). The input monitor already runs at the chosen rate, so you hear the grit before you record
- More sampling time: on a 1 MB EII+ about 17.6 s at 27.8 kHz, 35 s at 13.9 kHz, 70 s at 6.9 kHz and about 140 s at 3.5 kHz
- Samples play across all 61 keys and up to four octaves below the original key, without the octave folding of the original OS
- SP-12 switch: anti-alias and output filters fully open for maximum aliasing, or back to the E-mu behaviour
- Analog mode in eight settings (ANA 0-7): snappier, analog-style envelopes (filter sweeps open fast and settle like an RC curve, concave amplitude attack) and optional pitch drift per voice, like old analog oscillators
- Cutoff and resonance for all voices from the panel, resonance twice as strong and able to self-oscillate
| Slider B | Recording sample rate / sample time in octave steps |
| Key 8 | Filter menu: A output filters, C cutoff, D resonance |
| Key 8, 8 | SP-12 switch on/off |
| Key 8, 6 | Analog mode: steps through ANA 0-7 |
Analog mode (ANA 0-7)
| ANA 0 | Original E-mu envelopes, stable pitch |
| ANA 1 | Analog-style envelopes, stable pitch (default) |
| ANA 2 | Analog-style envelopes + light pitch drift (about ±6 cents, a small step every 0.16 s) |
| ANA 3 | Original envelopes + light pitch drift |
| ANA 4 | Analog-style envelopes + stronger drift (about ±16 cents, a step every 0.08 s) |
| ANA 5 | Original envelopes + stronger drift |
| ANA 6 | Analog-style envelopes + stronger, faster drift (about ±16 cents, a step every 0.04 s) |
| ANA 7 | Original envelopes + stronger, faster drift |
Drift moves only the pitch, each voice on its own. Every note starts slightly detuned at random and wanders from there; a note that has died away returns to its exact pitch. Envelope times in your presets stay as programmed.
EIIFX live effect
- The sample input runs through a ring buffer in sample memory: dry signal on output 1, effect on output 2, so it can run 100 % wet on an aux send
- Sample rate from 13.9 kHz down to about 240 Hz on an exponential slider curve
- S3528 anti-alias filter in front of the converter, SSM2045 cutoff and resonance, all gliding between values
- Delay from 2.3 ms to 2.2 s at the original pitch at every sample rate, plus freeze to loop the buffer
| Slider A / CC 74 | Anti-alias filter |
| Slider B / CC 76 | Sample rate |
| Slider C / CC 75 | Cutoff |
| Slider D / CC 80 | Resonance |
| CC 78 / CC 81 | Delay time / freeze |
Demo videos
SP12 sampling OS: a synth sampled at full and low sample rates, played across the keyboard and shaped with cutoff and resonance, plus the two envelope modes.
EIIFX on a 1984 Emulator II: sample rate, anti-alias, SSM2045 filter, MIDI CC and the glitch buffer, with an E-mu SP-12 for reference.
Tested on: Emulator II+ (1 MB, boot ROM v2.3) with a Lotharek HxC. Other configurations (512 KB units, boot ROM v2.1, real floppy drives) are untested.
Requirements: Emulator II or II+ with HxC or Gotek floppy emulator. Delivered as two disks (SP12 sampling OS and EIIFX), each as HFE and IMG image, with a README with all controls. Back to stock: boot any regular EII disk.
All OS Mods for vintage samplers
Use at your own risk. Back up your disks and samples before installing. TailOut Studios is not liable for damage to instruments, disks or data, or for loss of value of vintage hardware, unless caused intentionally or by gross negligence; liability for injury to life, body or health, under the German Product Liability Act and statutory consumer rights remain unaffected. E-mu, Emulator and SP-12 are trademarks of their respective owners, used solely to identify compatibility. This product is independent and not affiliated with or endorsed by them. Legal notes
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