🪸 Laminaria - compagnon for ORCΛ

Laminaria is a polyphonic Terminal based audio synth made in Rust.

This is a learning repo, goals are :

• Receive MIDI
• Generate Sound
• Use channels, mutexes and arc to manage thread concurrency

More info about the architecture on this blog post

🔈 Audio demo

You can do a bunch a things but I did glitchy ambient cause that is who I am (made with two units sequenced by ORCΛ, no other effects involved)

Click here to open the sound demo

🛒 Get it

Clone this repo and cargo build --release, then run Laminaria in target/release/. You can also use cargo run for a quick launch, but it will be less efficient.

⌨️ Key :

• Esc - quit
• ↑ | ↓ - select param
• ← | → - increment or decrement parameter
• [letter | number] - set the value of the parameter
• > - Increment midi channel
• < - decrement midi channel
• Tab - select midi input

📺 Display :

[Midiport name] --- channel [channelIndex]

[cc index] - [paremeter name] - [parameter value] - ||||||||||||||||----------------

---

IAC Driver Virtual Midi 1 --- channel 0

h - osc-hrmrat - w - ||||||||||||||||||||||||||||||||--- 1.79
g - osc-hrmgn  - w - ||||||||||||||||||||||||||||||||--- 2.74
a - env-atk    - 3 - |||-------------------------------- 83.40
d - env-dcy    - 3 - |||-------------------------------- 83.40
c - cutoff     - z - ||||||||||||||||||||||||||||||||||| 20000.00
t - dly-time   - 4 - ||||------------------------------- 0.14
f - dly-feed   - 4 - ||||------------------------------- 0.11
w - dly-wet    - 0 - ----------------------------------- 0.00
r - rvb-wet    - 0 - ----------------------------------- 0.00
9 - rvb-time   - 0 - ----------------------------------- 0.00
v - volume     - e - ||||||||||||||--------------------- 0.32

⚙️ Description of the Synth

The synth has four voices. ∿Oscillators are sinewaves banks where you manage the ratio and the gain of each harmonics (so a kind of additive synthesis).

Amplitude Envelope are basic ASR. The sum of oscillators goes to a classic low-pass filter.

It then goes trough two FX, delay and Reverb. If you put the delay feedback to max, it loops the captured sound. Delay time will then pitch the sound up and down (which is the coolest thing to do with this synth). The Reverb is just 5 allpass filters in series, there are a lot of resonance due to feedback.

👩🏿‍💻 Hack it

I may do a proper boilerplate someday, as of now it should already be pretty hackable :

• add parameter in the parameter file
  • add a key in the Parameter ID enum
  • increment the NUMBER_OF_PARAMETER const
  • add its definition in Parameter::new()
  • get the value of the parameter in synth::set_parameter()
• define the sound in synth::process()

📚 Lib :

• cpal for audio
• midir for midi
• cross term for terminal I/O

Don't hesitate to ask questions !