Session 22: Parts Deep Dive — Save, Reload, Copy

Objective: Internalize what a Part stores vs. what a Pattern stores. Save your current state as Part 1. Copy it to Part 2. Modify Part 2 (different bass sample, different effects). End up with two completely different sounds sharing the same trigger patterns. This is the cornerstone of Octatrack songwriting.

Warm-Up (2 min)

Up to now you've been working in one Part. The Part is the OT's "preset slot" — it stores everything except the trigger patterns themselves. Press [FUNC] + [CUE] right now to reload the current Part. Anything you'd changed reverts. That gesture is your safety net, and Parts are about to become your songwriting structure.

Setup

Start from the LAB project with a 4-track pattern: Track 1 drums, Track 2 bass (a single bass sample with pitch p-locks from Session 14, ideally), Track 3 melodic pad, Track 4 hat or shaker. Each should have a Multi Mode Filter on FX1 and a reverb on FX2.

Save the Part now (you're about to overwrite it intentionally — better to have a clean baseline first): [FUNC] + [PART] → SAVE → confirm.

Exercises

Exercise 1: What's in a Part vs. a Pattern (4 min)

Get the mental model straight before doing any operations.

A Part stores:

• Track machine assignments (which slot is Flex/Static/Thru/Neighbor/Pickup)
• Sample slot list assignments per track
• All FX settings (FX1 type and parameters, FX2 type and parameters)
• LFO setup (waveforms, destinations, depths, speeds)
• Scene snapshots (all 16 slots, both Scene A and Scene B assignments)
• Track volumes (LEV) and mixer settings
• AMP envelope settings

A Pattern stores:

• Trigger placements (which steps fire on which tracks)
• Parameter locks (per-step parameter overrides)
• Sample locks (per-step sample swaps)
• Trig conditions (1:2, FILL, etc.)
• Trig types (sample trig, recorder trig, one-shot, slide, swing)
• Pattern length and time signature
• Tempo (when in pattern-tempo mode)

The split: Parts = sound design. Patterns = arrangement. A single Part can be paired with many Patterns. A single Pattern can be played under many Parts.

Exercise 2: Save Part 1 — The Verse Sound (4 min)

Capture your current state as Part 1 deliberately.

1. With your 4-track pattern playing nicely, press [STOP]
2. Press [PART] to open the Part menu — you see Part 1 highlighted (with a name slot if it has one)
3. Press [FUNC] + [PART] to access Part operations. Select SAVE, confirm with [YES]
4. Optionally rename: in the Part menu, edit the Part name to "VERSE" or similar (firmware-dependent gesture; usually a NAME or RENAME option)
5. Save the Project: [FUNC] + [PROJ] → confirm. The Part is now persisted to the CF card

What just happened: Part 1 = a snapshot of your sound design. Even if you change everything in the next 10 minutes, [FUNC] + [CUE] reloads back to this exact state.

Exercise 3: Copy Part 1 to Part 2 (4 min)

Cloning a Part lets you preserve the verse sound while you experiment with a chorus variation.

1. Press [PART] to open the Part menu
2. Highlight Part 1 (the source). Open the Part operations: [FUNC] + [PART]
3. Select COPY (or COPY PART) and confirm
4. Highlight Part 2 (the destination)
5. Open Part operations again: [FUNC] + [PART], select PASTE (or PASTE PART), confirm with [YES]
6. Switch to Part 2: in the Part menu, navigate to Part 2 and press [YES]. The screen shows you're now editing Part 2
7. Press [PLAY]. The pattern plays exactly as before — Part 2 is currently identical to Part 1
8. Save Part 2 immediately so you have a fresh baseline: [FUNC] + [PART] → SAVE

Exercise 4: Transform Part 2 — Different Sound, Same Triggers (8 min)

Now diverge Part 2 dramatically while leaving the trigger patterns alone.

1. With Part 2 active and pattern playing:
2. Track 2 (bass): Open SRC. Use Quick Assign to swap the bass sample for something more aggressive (a distorted bass, a saw stab, an FM bass). The pitch p-locks from before still fire — same melody, different timbre
3. Track 1 (drums): Press [FX1]. Increase the filter RESONANCE to 60, lower FREQ to 80. Drums become more aggressive
4. Track 3 (pad): Press [FX2]. Swap the reverb type from Plate to Dark Reverb. Boost the MIX to 70. The pad becomes a wash of darker atmosphere
5. Track 4 (hat): Open AMP. Swap the AMP envelope to a much shorter release. The hats become tighter
6. Press [PLAY]. Listen — same drum hits, same bass notes, same pad rhythm, but the sound is completely different. This is Part 2 as the chorus
7. Save Part 2: [FUNC] + [PART] → SAVE

Exercise 5: Toggle Between the Two Parts Live (3 min)

Switching Parts mid-pattern is a song-section transition.

1. Press [PLAY]. Pattern plays under Part 2 (the chorus sound)
2. Press [PART], navigate to Part 1, press [YES]. The Part switches between bars (typically — the OT quantizes Part changes to the pattern boundary so it doesn't glitch mid-bar)
3. The same triggers now sound like Part 1 (the verse). Switch back to Part 2 — chorus
4. Use Cases:
   • Verse/chorus toggling within a single pattern
   • Switching Parts to test variations during composition
   • Live-set "drop the chorus version" moves
5. Important: changes you make to a Part are LOST if you switch away without saving. [FUNC] + [CUE] is your safety net, and [FUNC] + [PART] → SAVE is your commit gesture

Exercise 6: The Reload Discipline (Quick — 2 min)

Make sure you internalize the save-or-reload rule.

1. With Part 2 active, change something obvious (turn down all of Track 1's LEV)
2. Press [FUNC] + [CUE] — the Part reloads. Track 1 is back at full LEV
3. Now make the same change AND press [FUNC] + [PART] → SAVE before reloading
4. Press [FUNC] + [CUE] — the Part reloads, but Track 1 stays muted because you saved it that way
5. The discipline: if you like a change, SAVE. If you don't, RELOAD. Never assume the OT remembers tweaks you didn't commit

Output Checklist

• I can articulate (in my own words) what a Part stores vs. what a Pattern stores
• I saved my current state as Part 1
• I copied Part 1 → Part 2
• Part 2 has a meaningfully different sound (different bass sample, different FX) while sharing Part 1's triggers
• I switched between Part 1 and Part 2 with the pattern playing
• I practiced the save-or-reload discipline ([FUNC] + [PART] → SAVE vs [FUNC] + [CUE])

Key Takeaways

• Parts = sound design (machines, FX, scenes, LFOs, volumes). Patterns = arrangement (triggers, p-locks, conditions). This split is what gives the OT its compositional power
• One Part + many Patterns = same sound across multiple sections (intro/verse/chorus all share Part 1)
• Many Parts + one Pattern = same triggers, different sounds (verse Part vs chorus Part)
• [FUNC] + [PART] → SAVE is your commit gesture. [FUNC] + [CUE] is your reload gesture. Use them constantly
• Part changes during play quantize to the pattern boundary — you don't get glitchy mid-bar transitions

Next Session Preview

Next: pattern variations. With Part 1 as your verse sound, you'll create A01-A04 as four different patterns (intro, verse, chorus, break) all sharing Part 1. Different triggers and p-locks per pattern, same sound design. Pattern chaining. The basic shape of a song.