Preparing Samples for the SP-1200

SampleStack gets your audio to the SP-1200's own format and within its limits. The transfer itself is a separate step, and there are three ways to do it — including the one most owners actually use.

What SampleStack Does

An SP-1200 collection is a preparation folder. It converts samples to 26.04 kHz mono, keeps file names inside the 16 characters the Disk module can display, and adds up the durations against the roughly 20 seconds of sampling memory. It does not write to the SD card and cannot load anything onto the sampler.

Why Not Just a Card?

The reissue's SD card slot is genuinely useful, but it isn't a WAV player. Its Disk module works with the sampler's own sound and sequence files — exactly as the original worked with floppy disks — and it imports vintage SP-1200 disk images in .HFE format. Rossum's quickstart guide never mentions WAV files, and dropping some on the card won't make them appear in the Disk module.

Step 1: Prepare the Samples

1. Add a collection and set its type to SP-1200.
2. Drag in the samples, or copy them from a sample library.
3. Convert what SampleStack flags — it targets 26.04 kHz mono at 16-bit.
4. Trim anything long. The collection totals the durations so you can see how much of the memory you've used before you transfer.

Trimming and fades are worth doing here rather than on the device: you have a waveform, cue points and undo, and the SP-1200 has 20 seconds.

Step 2: Get Them Onto the SP-1200

Three routes, most practical first:

• Sample it in over the audio input. Play the prepared file out of your interface and sample it on the SP-1200, then save the sound to the card. It sounds like a step backwards, but it's how most owners work, and the preparation still pays: the file is already mono at the right rate, trimmed to length and inside the memory budget, so what you record is what you meant to record.
• MIDI Sample Dump Standard. The reissue supports SDS, so a utility that can send an SDS dump will transfer a sample over MIDI without going through the audio path. Mac options are thin, and a dump is slow, but it's lossless.
• An .HFE disk image. The SP-1200 imports vintage disk images from the card. This is the neatest route if you have a way to build an image containing your own sounds — note that it means writing the original SP-1200 disk format, not just renaming a folder, so check what your tooling can actually produce before relying on it.

Whichever route you take, Set-up Special Function 27 creates folders on the card from the front panel, so you can organise sounds without a computer once they're across.

Why 16-bit for a 12-bit Sampler?

Because a WAV file can't hold 12-bit audio — macOS has no such format. SampleStack prepares at 16-bit and lets the SP-1200 do its own reduction to 12 bits, which is a large part of why the machine sounds the way it does. Reducing the bit depth yourself first would only add a second, different quantisation before the one you actually want.

The sample rate is the part that matters here, and that SampleStack can get exactly right: 26.04 kHz, the rate of the 1987 original, kept by the reissue.

The Memory Budget

The reissue holds about 20 seconds in total, shared across its pads — twice the original's ten. SampleStack reports the total duration of a collection against that figure. It's a guide, not a hard limit: how much any one sound can use depends on how you split the memory across banks, so a long sample is flagged as something to look at rather than an error.

File Names

The Disk module shows a 16-character display name for each file and folder on the card. Longer names aren't rejected outright, but you can't read or reliably pick them on the device, so SampleStack flags them while they're still easy to change.