User guide

What you need

• A Spark 2 amplifier (the Spark NEO works too, see further down).
• Chrome, Edge or Opera, on an Android phone or a computer: these are the browsers that can talk to Bluetooth.
• No account, no sign-up: the library lives inside the browser you use.

Putting it on your phone

1. Open the app in Chrome on your phone.
2. If the Install banner appears, tap it. Otherwise: Chrome's menu ⋮ → Add to Home screen / Install app.
3. From then on it opens like a real app, full screen, and works without a connection: at a gig you don't need Wi-Fi.

1. The logo: from anywhere in the app, one tap here takes you back to the presets.
2. Connect: red when the amp is missing, green when it's there.
3. Live → switches to the view for playing; from there, ← Presets comes back here. Android's back button also returns to the presets.
4. The ⋯ menu: all the other actions, this guide included.

1. Hardware presets: the eight presets stored in the amp. Bank A red, bank B green, like the LEDs on the device. A slot the app hasn't read yet is shown dashed and says not read yet.
2. In the library: all your other presets, with no limit. A preset sits either above or below, never in both places.
3. The coloured edge on the left is the sound family (blue clean, red drive…): you can tell at a glance without reading.
4. ▶ plays that preset on the amp straight away, without touching any slot. It's the quickest way to try one out.

Tap a preset's name — above or below — to open its card.

• Search looks at the name, notes, categories and even the effects: “gilmour delay” finds the presets that have both words somewhere.
• The menu next to it sorts by name, recently added, recently modified, or sound family.
• The pills below filter by category; the number says how many presets are in it. They appear as soon as you create your first category.

1. Play · Tweak · Copy · Delete. Play makes the preset sound (like ▶). Tweak opens the knobs. Copy makes a duplicate to modify — it's the right way to create a new preset. Delete removes it from the library (it asks first, and the amp is not touched).
2. Send to HW preset writes it into the slot chosen in the menu next to it: from then on it's in the amp, even with the phone off.
3. Add to bank puts it in the first free place of a live bank. It doesn't touch the amp. It appears once you have at least one bank.

When you open one of the eight slots at the top there's also Select A1 (or whichever slot it is): it tells the amp to switch to that slot, without writing anything.

You change the name by typing in the field. Note: the amp keeps the old name until you write the preset into a slot again.

Sound family — what kind of sound it is

One per preset, chosen on the card. Its colour shows on the library row, on the editor's sign and on the LED of the live buttons. A preset without a family stays uncoloured. The colours are yours to change: ⋯ → Categories, tap the colour.

Categories — the style, or the song

As many as you like per preset. You create them from the card (＋ new…) or from ⋯ → Categories, and they become the pills that filter the library. Deleting a category removes it from the presets; the presets stay.

1. The banks. Amp is the amp's eight slots, always up to date. The others are yours: ＋ bank creates a new one, with eight places.
2. The lit button (light blue) is the preset that's playing. The dot at the top has its family's colour (green if it has none), and lights up on the one that's playing.
3. The label under the name (A1, A2…) means that preset is already in the amp: it starts instantly.
4. Without a label the whole preset is sent over: it takes about a second, and the thin bar at the bottom of the button shows the progress.

1. The sign with the preset's name, in its family's colour. If it says OFFLINE underneath, you're tweaking without the amp (see below).
2. The tempo of the preset, the one delays and modulations follow: − + for one bpm at a time, or TAP in time — two taps are enough, and the button blinks in time.
3. The chain: the seven blocks in signal order, each in its own colour. The lit dot tells you whether the block is active; the ones switched off are faded. It scrolls sideways: tap a block to open it.
4. ‹ › move to the previous or next block without going back to the chain. The model name is a menu: from there you change amp, pedal or reverb type.
5. on / off: switches the block on or bypasses it.
6. The knobs: you turn them by dragging up or down, not in a circle. Values from 0 to 10, like the real ones.

• You hear it straight away. With Tweak the app sends the preset to the amp and reads the real state back from the amp: whatever you turn, you hear while you play.
• Nothing is saved until you press Save. Save writes to the library, over that preset. If you want to keep the original too, Copy first and tweak the copy.
• The amp's slot doesn't change when you save: to put the new version in the amp, use Send to HW preset on the card.
• If you leave with Done and have unsaved changes, the app asks: Save and leave, Leave without saving or Back to the editor.

• Without the amp the editor opens anyway, on the library copy: you won't hear anything, but you can look at the chain, change models and knobs, and save. Handy on the sofa.
• Knob names in italics are suggestions taken from a catalogue: the amp doesn't send them. Tap the name to change it: it applies to that model in every preset. The ones in plain text are the ones you named yourself.
• In the editor's ⋯ menu: Re-read from the amp (if you turned the real knobs on the device) and How it works, the short reminder.