01

Before you start

Stock firmware. Nothing to flash.

What it does

Loads your own songs onto an SP-1 running the original TE firmware.

It overwrites

New stems replace what is on the device when the track list does not match.

Still in beta

v0.3, by Tim Knapen and solderless.

02

Prepare the file

One file per song. Not one per stem.

The format

24-bit, 48 kHz, 8-channel PCM WAV.

Four stereo stems

Combined into a single file. Separate stems will not load.

Channel order

Pairs in order: 1-2 is stem 1, 3-4 stem 2, 5-6 stem 3, 7-8 stem 4.

Fewer channels

Missing pairs become empty stems. Anything past 8 is ignored.

Check it

Reopen the export. Eight mono tracks, all audible together.

No stems yet

Split with Demucs GUI, then merge with SP-1 merge.

03

Connect

Boot mode, then transfer mode.

Start from off

The SP-1 must be powered down before you plug in.

Hold while plugging in

hold T1+T4

Keep holding until the track 1 light comes on, then let go.

Connect

Click Connect and pick stem player from the list.

Transfer mode

The loader switches it over and the track 1 light goes out.

04

Load

Drag, order, label.

Drop the files

Drag your WAVs onto the window.

Reorder

Drag a song by its track number.

Label

Album title, song title, artist and BPM are all editable.

BPM matters

It drives MIDI clock, the gate effect and looping. 30 to 300.

Default is 80

Tempo is not detected. Put 66BPM in the filename and it reads it.

05

Transfer

Slow. Plan for it.

Ten to one

One minute of audio takes about ten minutes to transfer.

While it runs

The track 1 light blinks and audio is off.

Keep the tab open

Closing it, or letting the machine sleep, fails the transfer.

When it ends

The SP-1 restarts, audio returns, and it comes back in basic mode.

06

Stop and resume

Interruptions are survivable.

Abort any time

Click Abort transfer.

It remembers

Finished songs carry a green dot and are skipped next time.

Unfinished

A red dot means it will go again from where it stopped.

Re-send one

Click the track number, then Include or Transfer song.

Skip one

Click Skip and the next album transfer leaves it out.

07

Adding more

Append only.

Add to the end

New songs go last. Transfer album again.

Keep the old ones listed

Remove a transferred song from the list and it gets overwritten.

Reordering costs

Change the order and those songs must all go again.

Deleting shifts

Every song after a removed one is re-transferred.

08

What it cannot see

The loader is writing blind.

No filesystem

One continuous block of data. Nothing to browse.

No readback

It cannot see, move or delete what is on the device.

It only remembers

The list is what the loader sent, not what the SP-1 holds.

Changed elsewhere

Use another tool and the loader will not know.

09

Space and speed

Four gigabytes. Twelve megabits.

56 minutes

4 GB of storage. The loader stops you going over.

Always 8 channels

Empty stems are still written, so they still cost time.

Compression will not help

Transfer time tracks song length, not file size.

Why so slow

USB 2.0 Full Speed, and the stock protocol tops out near 135 KB/s.

10

When it looks dead

It is usually still in transfer mode.

Unresponsive after an interruption

Normal. It is holding transfer mode and cannot play.

Power it down

hold FN

Long press the function button.

Power it up

tap FN

Press it again.

It reconnects

With the tab still open it finds the device and returns to transfer mode.

Re-send the unfinished

A part-written song needs transferring again.

11

Missing files

A warning about your computer, not the SP-1.

Not missing from the device

The icon says the loader lost the path on your disk.

Why

Browsers cannot keep file handles across reloads.

Fix

Drag the files in again and they relink.

Incognito

A private window keeps no track list at all.

Stem Loader

48 notes

Open Stem Loader ↗