Wakes v0.4.8

Pre-release for beta testing. Tested on a single SP-1 unit. Read docs/SAFETY.md before flashing, and see docs/Wakes - Manual.pdf for how to play it. Report problems with the bug form under Issues.

What's new since v0.4.6

• Stability: resolved multiple crashes on heavy models when every feature ran together. With Plaits, Marbles, the drive and OUT+AUX all running, the CPU could overload and reset the device (#22).
• Optimizations: more CPU headroom across the engines. The biggest gains are on Chords and the virtual-analog family, with no change to their sound (#22).
• Optimizations: the drive and output stage are lighter. The drive now acts on the selected output as one signal, so OUT+AUX and OUT×AUX distort together (#22).
• OUT×AUX now passes through Plaits' low-pass gate after the multiply, so the envelope shapes the product once. Expect a slightly different decay on plucked notes in this mode (#22).
• Chords: each note's organ-to-wavetable crossfade on MORPH is shorter, and settles to one side when MORPH rests (#22).

Flashing

Read docs/SAFETY.md first. The SP-1 has no hardware reset pin.

1. Open https://solderless.engineering in a browser and connect the SP-1 over USB-C.
2. Hold Track 1 + Track 4 while plugging in. The four track lights go solid.
3. Select wakes-sp1-v0.4.8.bin, flash, then unplug and replug.

Check the file against SHA256SUMS before flashing.
wakes-sp1-v0.4.8-fallback.bin is the test-tone build without Plaits or Marbles,
for diagnosing hardware only. It is not the instrument.

Size vs v0.4.6

plaits vs v0.4.6

Config: plaits

	base	head	Δ	of total
FLASH (.bin)	386,132	393,584	+7,452	43.09%
RAM	66,965	67,686	+721	25.82%

Sections that changed

section	base	head	Δ
text	207,504	212,756	+5,252
rodata	174,448	176,620	+2,172
bss	39,521	40,226	+705
datas	2,416	2,432	+16

check_image

check_image: build/zephyr
  [PASS] _vector_table at 0x20000  (0x20000)
  [PASS] no load segment below 0x20000  (lowest LMA 0x20000)
  [PASS] no load segment at or above 0xFF000  (image ends 0x80170)
  [PASS] wakes-sp1.bin matches the ELF's loadable span  (393584 B vs 393584 B)
  [PASS] .map: FLASH region origin 0x20000  (0x20000)
  [PASS] .map: FLASH region ends at 0xFF000  (0xff000)
  [PASS] .map: _vector_table at 0x20000  (0x0000000000020000)
  [PASS] CONFIG_USE_DT_CODE_PARTITION=y  (got y)
  [PASS] CONFIG_FLASH_LOAD_OFFSET=0x20000  (got 0x20000)
  [PASS] CONFIG_WATCHDOG=y  (got y)
  [PASS] CONFIG_REBOOT=y  (got y)
  [PASS] CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH=y  (got y)
  [PASS] one layout per Plaits/Marbles class  (173 classes)
  [PASS] SP1_FORCE_CALIB is 0  (got 0)
wakes-sp1.bin: 393584 B (43.09% of the slot), plaits config
OK: safe to hand over for flashing

fallback vs v0.4.6

Config: fallback

	base	head	Δ	of total
FLASH (.bin)	83,276	83,420	+144	9.13%
RAM	30,490	30,550	+60	11.65%

Sections that changed

section	base	head	Δ
text	71,524	71,668	+144
bss	4,238	4,298	+60

check_image

check_image: build/zephyr
  [PASS] _vector_table at 0x20000  (0x20000)
  [PASS] no load segment below 0x20000  (lowest LMA 0x20000)
  [PASS] no load segment at or above 0xFF000  (image ends 0x345dc)
  [PASS] wakes-sp1.bin matches the ELF's loadable span  (83420 B vs 83420 B)
  [PASS] .map: FLASH region origin 0x20000  (0x20000)
  [PASS] .map: FLASH region ends at 0xFF000  (0xff000)
  [PASS] .map: _vector_table at 0x20000  (0x0000000000020000)
  [PASS] CONFIG_USE_DT_CODE_PARTITION=y  (got y)
  [PASS] CONFIG_FLASH_LOAD_OFFSET=0x20000  (got 0x20000)
  [PASS] CONFIG_WATCHDOG=y  (got y)
  [PASS] CONFIG_REBOOT=y  (got y)
  [PASS] CONFIG_CLOCK_CONTROL_NRF_K32SRC_SYNTH=y  (got y)
  [PASS] SP1_FORCE_CALIB is 0  (got 0)
wakes-sp1.bin: 83420 B (9.13% of the slot), fallback config
OK: safe to hand over for flashing

SHA-256

5658e01e307dc2c5abada8ab3d947981b4ce6715ba8c76d9018af5444f4cb300  wakes-sp1-v0.4.8-fallback.bin
c3b550a15395d6631ebefc0747e2cc783e4315466a840599be02e90bb97741c6  wakes-sp1-v0.4.8.bin