Analog BD for Elektron Analog Rytm

BD ANALOG: repeat98's 808 and 909 bass drum models from Analog BD, as a Rytm machine on the BD, SD and BT tracks.

Module version 0.2.0-experimental. Base firmware: 1.74.

About this module

Plays the 808 and 909 bass drums Jannik Aßfalg (repeat98) modelled for Analog BD on the Octatrack, computed on the Rytm's ColdFire at 48 kHz and sent through the voice's own filter, overdrive and amp. A tap of encoder B switches the sound between 808 and 909; each hit's velocity is the accent.

• The Octatrack Analog BD's 808 and 909 models, at 48 kHz.
• Tap encoder B to switch 808 and 909; the choice saves with the sound.
• Accent follows each hit's velocity: soft hits rounder, hard ones snappier.
• Runs on the BD, SD and BT voices, through their stock filter, AMP and OVR.

How to use it

1. Select the BD track, press FUNC + SRC, scroll to BD ANALOG (the last of the BD section) and press YES.
2. Play the pad soft and hard: velocity is the accent, harder hits are snappier.
3. Turn TUN for the pitch and DEC for the length; SWP sets how far the pitch sweeps down.
4. Tap encoder B: the label changes from TON to SWT and the bar from 808 to 909. Play it again, and tap again for the 808.

Compatibility notes

• Built for OS 1.74 only, on the Modwerk base's digital voices (send-bus variant).
• Offered on the BD, SD and BT tracks only: on a MKII three 909s hit at the same instant played clean and four overran the audio block.
• The level into the voice's analog path and how hard it can be driven are not measured.

Test evidence

rytm-emu on OS 1.74: select, keys, 808/909 tap, meter; assembly passes match their C (asm_check, 0 differences); host engine within -41 to -68 dB of repeat98's models. Unit: by hand (0.1.0, AB04; 0.2.0 on the published base, VB01: choice, tap, kit reload, sound lock, power cycle) and the author's rig (BL01: sweeps follow the model, stress as limited).