Getting Started
with TREMOR

1 Install & Setup

Tremor is currently available as a TestFlight beta for iOS and macOS. Here's how to get running:

2 First Look

When you launch Tremor, you'll see the 2-Deck layout — the default workspace. Here's what's on screen:

On iPhone, swipe the center panel to access Volume, EQ, Sync, Stems, Hot Cues, Beat Loops, Pad FX, Sampler, Loops, Effects, and Settings. On iPad, more controls are visible at once depending on your chosen layout.

3 Load Your Tracks

The Library panel at the bottom shows your music collection. Tremor automatically indexes BPM, key, and genre.

Loading Methods

• Drag & Drop — Drag any track from the Library onto a deck. The waveform analyzes instantly.
• Double-tap — Double-tap a track to load it to the next available deck.
• Music Note Button — Tap the music note on a deck's transport bar to open the library for that deck.
• Files Import — Switch to the Files tab to import audio or video from the Files app, SoundCloud, or external storage.

4 Your First Mix

Let's walk through a basic transition between two tracks:

◎ Deck Layout

Each deck contains three main areas arranged horizontally:

Deck B is mirrored — the pitch fader sits on the left and controls on the right, so both decks read symmetrically from the center outward.

The Platter

The center platter renders a real vinyl record using Apple Metal GPU shaders. Every groove is mathematically generated — it's not an image. Spin it to scratch, nudge it to adjust timing. The small cyan dot at the top shows rotational position.

Pitch Fader

Vertical slider controlling playback speed. The range is ±100% by default (configurable to ±6%, ±10%, ±16%, ±25%, or ±50% in Settings). The center detent is 0.0% — original tempo.

◇ Waveforms

Tremor's waveforms are harmonically colored, meaning different frequency ranges get different colors:

• Low frequencies (bass/kick) — Displayed in cyan/blue. Look for the big punchy blocks — those are your kicks and bass hits.
• Mid frequencies (vocals/synths) — Displayed in purple. The body of most tracks lives here.
• High frequencies (hats/cymbals) — Displayed in magenta/pink. Useful for identifying breakdowns and builds.

Beat Grid

Vertical lines on the waveform mark detected beats. The downbeat (beat 1 of each bar) is brighter. When two waveforms are beat-matched, you'll see their grids align perfectly — that's how you know you're in sync.

Zoom & Navigate

Pinch to zoom the waveform in/out. Scroll horizontally to preview upcoming sections. The overview waveform at the top shows the full track with a position marker.

◈ The Mixer

The center mixer section contains everything you need to blend two channels:

Per-Channel Controls

• GAIN — Adjusts input level before EQ. Set it so the meter peaks around -6dB for headroom.
• HI / MID / LOW — Three-band EQ. Full kill at minimum. Use these to swap bass between tracks during transitions.
• FILTER — Combined high-pass / low-pass. Center position = off. Turn left for low-pass (removes highs), right for high-pass (removes bass).
• Channel Fader — Volume for that channel. Keep it at ~80% and use gain for level matching.
• CUE — Sends this channel to your headphones for previewing.

Crossfader

The horizontal crossfader at the bottom blends between Deck A (left) and Deck B (right). Center position plays both at equal volume. For scratching, set the crossfader curve to sharp in settings. For smooth transitions, use smooth curve.

Level Meters

Each channel has a stereo LED meter. Green = healthy. Yellow = hot. Red = clipping. The master output meter is in the center.

▦ Performance Pads

Each deck has 8 visible pads in a 2×4 grid with 2 pages (16 total slots). Use the ◂ ▸ page arrows to switch pages. Five modes change what the pads do:

◉ Hot Cue

Set and trigger cue points in the track. Each pad stores a position — tap to jump there instantly. The pads light up in unique colors so you can identify them at a glance.

✦ Pad FX

Trigger beat-synced effects by holding a pad. Release to cut the effect. Effects include Echo, Reverb, Flanger, Phase, Trans, Roll, Filter, Noise and more.

⟳ Beat Loop

Instantly trigger loops of specific lengths: 1/32, 1/16, 1/8, 1/4, 1/2, 1, 2, 4 beats. Great for build-ups and breakdowns.

♫ Sampler

Trigger one-shot samples or loops. Load your own samples or use the built-in library. Independent of deck playback.

≡ Stems

Control AI-separated stems: Vocals, Drums, Bass, Melody. Mute, solo, or apply FX to individual parts of the track in real-time.

✦ FX Engine

Tremor's 32-bit floating-point FX engine gives you studio-grade effects with zero aliasing. Each deck has a dedicated FX unit with 3 effect slots.

Effect Controls

• Effect Selector — Choose from 16 effects: Echo, Reverb, Flanger, Phaser, Filter, Distortion, Bit Crush, Gate, and more.
• Wet/Dry Knob — Controls the mix between clean and effected signal. Fully left = dry, fully right = 100% wet.
• Beat Selector — Sets the time parameter in musical divisions: 1/4, 1/2, 1, 2, 4 beats. Synced to the deck's BPM.
• On/Off Toggle — Enable or bypass the effect. The slot glows when active.

≡ AI Stems

Tremor uses on-device Neural Engine processing to separate any track into four stems in real-time:

What Can You Do?

• Acapella transitions — Mute drums + bass on the outgoing track, keep only vocals floating over the incoming track's beat.
• Instrumental drops — Kill the vocal stem and let just the beat ride. Perfect for building tension before a drop.
• Live mashups — Play the vocals from Track A over the beat of Track B. No pre-production required.
• Stem FX — Apply effects to individual stems. Echo on vocals only. Filter sweep on just the bass. Infinite creativity.

⌨ Keyboard Shortcuts

Tremor is fully keyboard-controllable. Here are the essential shortcuts:

Deck A

Deck B

Global

◆ MIDI Controllers

Tremor supports any class-compliant MIDI controller. Plug in via USB or Bluetooth and Tremor auto-detects it.

Auto-Mapping

Tremor ships with built-in mappings for popular controllers:

• Pioneer DDJ-1000 / DDJ-FLX10 — Full 4-deck mapping with jog wheel sensitivity calibration.
• Native Instruments Traktor Kontrol S4 — Including touch-sensitive knobs and LED feedback.
• Numark Mixtrack Pro FX — Great budget option, fully mapped.
• Denon DJ MC7000 — Dual USB, all 4 decks, FX paddles.

Custom Mapping

Open Settings → MIDI → Learn Mode. Tap any on-screen control, then move a physical control — Tremor links them. You can save and export mapping profiles to share with others.

☁ Streaming Integration

With Tremor Pro or Club, you can stream tracks directly from major music services without downloading them first.

Supported Services

• Beatport LINK — Access the full Beatport catalog. Pre-analyzed BPM and key data. Offline caching for sets.
• SoundCloud Go+ — Stream from the world's largest independent music platform. Great for finding underground tracks.
• TIDAL — Lossless quality streaming. MQA and HiFi Plus supported for the best audio fidelity.

Streaming tracks are cached locally during playback. If you lose connection mid-set, the cached portion continues playing. We recommend pre-caching your planned tracks before a gig via Settings → Streaming → Pre-cache Playlist.

★ Pro Tips