FV-1 Programs

List of SpinASM code for guitar effects pedals and other applications

Introduction

The goal of this project is to be a comprehensive directory of patches, programs, or banks for the Spin Semiconductor FV-1 DSP integrated circuit (IC) that can be used in DIY guitar effects pedals, and other hobbiest projects. It is community-driven and built entirely of contributions from people like you, so please submit any programs you'd like to share.

This entire site is open source and hosted on GitHub

Circuit / PCB

Unless otherwise noted, all of these programs are assumed to work on the "typical application" circuit from the FV-1 datasheet, and should also run fine on either the Mimir's Well: FV-1 platform pedal, or the Arachnid board from PedalPCB.

List of FV-1 Programs

 
 
Echo with Repeats
 
 
 
 
 
 
Phase shifter
 
 
 
 
Vibrato (after strike)
 
 
 
 
RMS limiter
 
Approx 10dB limiting range, stereo I/O, common control (to maintain image) 
RMS limiter/expander example
 
Simple RMS limiter/expander example 
 
Mini reverb example 
Soft knee RMS limiter
 
 
Simple limiter
 
Simple limiter, -12dB threshold, peak detecting 
+/-20dB gain/loss
 
Example program for +/-20dB gain/loss 
Sine wave generator
 
Sine wave generator, uses POT0 and POT1 for coarse and fine adjustment, POT2 for amplitude control 
Battling LFOs
 
What happens when one LFO controls another, and that controls another and that controls another and that controls the first one? 
Active crossover
 
Active cross-over program for speaker equalization. Multiple bands of parametric EQ, etc. 
Reverb+HP+LP
 
by Dave Spinkler  
Reverb plus 2-pole high-pass and 2-pole low-pass 
Reverb+Flange+LP
 
by Dave Spinkler  
2 comments
Reverb plus flange plus 4-pole low pass 
Reverb+Pitch+LP
 
by Dave Spinkler  
Reverb plus pitch plus 4-pole low-pass 
Hall Reverb
 
 
Room Reverb
 
 
Plate Reverb
 
 
Gated Reverb
 
 
Echo Reverb
 
 
Stereo Echo Reverb
 
 
Chorus Reverb
 
 
 
 
ROM Pitch Shift
 
Pitch shifting program from the FV-1 internal ROM 
ROM Pitch Echo
 
Pitch-echo program from the FV-1 internal ROM 
Pitch + Reverb for karaoke apps
 
 
ROM Flanger + Reverb
 
Combination flange/reverb program from the FV-1 internal ROM 
ROM Reverb + Chorus
 
Reverb/chorus program from the FV-1 internal ROM 
ROM Tremolo + Reverb
 
Combination tremelo/reverb program from the FV-1 internal ROM 
ROM Reverb 1
 
Reverb 1 program from the FV-1 internal ROM 
ROM Reverb 2
 
Reverb 2 program from the FV-1 internal ROM 
Reverb/RT/D/F
 
Reverb program that allows three controls, reverb time, diffusion and high/low frequency damping 
Plate Reverb: Very Tight
 
by Harmon Grold  
Very tight, characterized by extreme density, slight tinnyness, explosive initial sound 
Plate Reverb: Tight
 
by Harmon Grold  
Tight, characterized by very high density, slight tinnyness, explosive initial sound 
Plate Reverb
 
by Harmon Grold  
Lush (large), characterized by very high density, explosive initial sound, large 
 
by Spin Semi  
1 comment
 
Dual LFO Chorus
 
by Graham Biswell  
Chorus with Rate and Depth controls and sounds just like a normal chorus but adds in the 2nd rate control to spook things up a bit. Rate 2 completely CCW turns it off. 
dattorro-shimmer_oct_var-lvl.spn
 
 
Dattorro Mix Reverb 
dattorro-var_filter-var_damping.spn
 
 
Dattorro Mix Reverb 
dattorro-var_filter-var_predelay.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay-var_damping-1k.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay-var_damping-2k.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay-var_damping-4k.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay-var_damping-8k.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay-var_damping-500.spn
 
 
Dattorro Mix Reverb 
dattorro_1oct_pitch-ip+fb-2k.spn
 
 
Dattorro reverb with fixed 1oct frequency pitch shift 
dattorro_1oct_pitch-ip-4k.spn
 
 
Dattorro reverb with fixed 1oct frequency pitch shift 
dattorro_var_pitch-ip+fb-4k.spn
 
 
Dattorro reverb with variable frequency pitch shift applied to input signal and feedback 
dattorro_var_pitch-ip-4k.spn
 
 
Dattorro reverb with variable frequency pitch shift applied to input signal 
dattorro-shimmer_val-lvl.spn
 
 
Dattorro Mix Reverb 
dattorro-var_predelay.spn
 
 
Dattorro Reverb - variable predelay 
Single Head Tape Echo + Spring Reverb
 
 
 
Dual Head Tape Echo + Spring Reverb
 
 
 
Single Head Tape Echo + Spring Reverb w/ Ping Pong
 
 
Not very tape echo like, really 
Dual Head Tape Echo + Spring Reverb w/ Ping Pong
 
 
Not very tape echo like, really 
Single Head Tape Echo
 
 
 
Single Head Tape Echo + Reverb
 
 
 
Ping Pong
 
 
 
Ping Pong 2:1
 
 
 
Dual Head Tape Echo + Reverb, w/ Ping Pong
 
 
reverb code is a 2 tap version of the Spin OEM1 Vocal Plate 
Dual Head Tape Echo + Reverb
 
 
reverb code is a 2 tap version of the Spin OEM1 Vocal Plate 
Stereo Pitch Transposer w/ Feedback and Delay
 
 
 
Looper simple
 
by Graham Biswell  
Looper with dual tap ping pong delay with adjustable feedback and fixed damping (damping has hpf & lpf) 
* Requires different circuit
Looper ping pong
 
by Graham Biswell  
Looper with dual tap ping pong delay with adjustable feedback and fixed damping (damping has hpf & lpf) 
* Requires different circuit
Ping Pong: Basic Wonky
 
by Graham Biswell  
Basic pingpong with adjustable feedback & damping ; damping has hpf & lpf ; some added wonkiness 
Ping Pong: Basic
 
by Graham Biswell  
Basic pingpong with adjustable feedback & damping ; damping has hpf & lpf 
Ping Pong: Stereo with Dual Taps
 
by Graham Biswell  
Simple stereo ping pong delay with adjustable feedback & damping 
Ping Pong with Dual Taps
 
by Graham Biswell  
 
Ping Pong: Simple
 
by Graham Biswell  
Simple ping pong delay with adjustable feedback & lpf damping 
Ping Pong: Simple Stereo
 
by Graham Biswell  
Simple stereo ing pong delay with adjustable feedback & lpf damping 
Ping Pong: Triple
 
by Graham Biswell  
Ping pong delay with 3 taps - left, right, centre ; centre is mixed with both left & right taps 
Triple Tap Cascaded Delay
 
by Graham Biswell  
 
Triple Tap Cascaded Delay - Stereo
 
by Graham Biswell  
 
Triple Tap Cascaded Delay - Stereo w/ Chorus
 
by Graham Biswell  
 
Triple Tap Delay - Parallel
 
by Graham Biswell  
taps are treated in parallel ; feedback & damping are fixed 
Triple Tap Delay - Parallel, Varying Feedback
 
by Graham Biswell  
taps are treated in parallel ; feedback & damping are fixed, but f/b varies slighly depending on delay time (longer time, less f/b) ; damping for each tap is different 
Triple Tap Delay - Parallel, Varying Feedback, w/ Chorus
 
by Graham Biswell  
taps are treated in parallel ; feedback & damping are fixed, but f/b varies slighly depending on delay time (longer time, less f/b) ; damping for each tap is different; With chorus 
Plate Reverb - Dattorro
 
 
 
Freeverb
 
by basilrush  
1 comment
Freeverb is a stereo reverb unit based on Jezar's public domain C++ sources, composed of eight parallel comb filters on both channels, followed by four allpass units in series. The filters on the right channel are slightly detuned compared to the left channel in order to create a stereo effect. 
Greenwood Delay
 
by slacker  
 
Pitch Transposer - Stereo
 
by ExertionMusic  
 
Reverse Reverb
 
by Malekko  
 
Hall Reverb w/ Shimmer
 
by Sweetalk  
 
New Shimmer Reverb
 
 
 
Octave Up and Down
 
 
 
Stereo Tremolo
 
by Digital Larry  
 
Stereo Ring Modulators w/ Chorus
 
by Digital Larry  
 
Triple Delay w/ Feedback
 
by Digital Larry  
1 comment
 
Stereo Dual Flange Multi Tap Delay
 
by Digital Larry  
 
Modulated Echo
 
by patb  
 
Interesting - w/ Overdrive
 
by Digital Larry  
1 comment
There is an overdrive going to the flanger and highpass/delay, but the reverb is driven directly from the input. 
 
by Digital Larry  
Flanger and highpass/delay, but the reverb is driven directly from the input. With some envelope control on the filter. 
Faux Phase Shifter
 
by Digital Larry  
Sounds like a phaser but in fact it is not one, strictly speaking. It is built up from resonant high pass and low pass filters mixed together 
Faux Phase Shifter - extra delay
 
by Digital Larry  
Sounds like a phaser but in fact it is not one, strictly speaking. It is built up from resonant high pass and low pass filters mixed together. Adds another delay to the resonant low pass 
Dual-Rate Chorus
 
by ice-nine  
Rate and Depth controls and sounds just like a normal chorus but adds in the 2nd rate control to spook things up a bit 
Cabinet simulator
 
by jovesdies  
 
Chorus: Bank of demo patches
 
by Digital Larry  
1 comment
 
Delay with threshold
 
by Digital Larry  
 
Delay: Bank of demo patches
 
by Digital Larry  
 
Filter tremolo
 
by Digital Larry  
2 comments
We have both filter tremolo and volume modulation with LFO 90 degrees phase shifted. This is similar to harmonic tremolo as found in some vintage tube amps. 
Flangers: Bank of patches
 
by Digital Larry  
 
Multi tap delays: Bank of patches
 
by Digital Larry  
 
New Flanger
 
by Digital Larry  
Flanger using rectified-sine modulation. LFO frequency and width are in inverse relationship from the pot to give good results over a wide frequency range with one knob. 
Oil can delay
 
by Digital Larry  
2 comments
 
Percussion Ambience
 
by Digital Larry  
Try this on some percussive material. 
Room reverb: 3-4-5
 
by Digital Larry  
1 comment
This one uses 3 delay lines with relative lengths in a ratio of 3 - 4 - 5 
 
 
 
by Digital Larry  
 
Through zero flangers
 
by Digital Larry  
1 comment
 
Square wave Tremolo, Aliaser, Reverb
 
by Digital Larry  
1 comment
Square Wave Tremolo with envelope controlled aliaser and reverb. Because why not? 
 
by madbeanpedals  
2 comments
This is a delay that allows you to mix in a phaser with the delays 
 
by madbeanpedals  
1 comment
A delay with pitch shift in the feedback path. Kind of a discount EQD Rainbow Machine 
 
by madbeanpedals  
1 comment
Emulates the Function F(x) Parallax pedal. It's a tremolo with a phase shifter and speed controls for each 
Spring Reverb + Tremolo
 
by Don Stavely  
Spring reverbs sound 'boingy' because of dispersion in the spring - higher frequencies travel slower than low frequencies. A 'spectral delay filter', consisting of many (100's) of unit allpasses will produce the desired 'chirp' impulse response... 
 
A basic flanger. Designed for bass 
 
A basic phaser with some overdrive in the feedback path. Designed for bass 
 
A delay with filtered overdrive in the feedback path. Designed for bass 
 
Simple reverberation effect. Designed for bass 
 
by Firesledge  
1 comment
Automatic wah effect based on the signal volume. Designed for bass 
 
by Firesledge  
1 comment
Simple distortion with variable gain, tone and mix. Designed for bass 
 
Harmonic tremolo with distortion. Designed for bass 
 
Harmonic tremolo mixed with a delay. Based on Madbeanpedals Starfield. 
8 second delay
 
by Don Stavely  
1 comment
This delays an input by eight seconds. It inteleaves the signal 8 ways in a single max sized delay 
Reverse delay
 
Simplified part of A+ Paradox delay 
 
by Frank Thomson, OCT Distribution  
 
Bit crusher
 
by Frank Thomson  
1 comment
 
Hall - modified
 
 
2 comments
 
 
by Frank Thomson, OCT Distribution  
 
Multi program pitch shifter
 
by patb  
1 comment
Inspired by commercial pedals. It has 6 programs, selectable by pot0 
Reverse delay
 
by Knut Helle  
 
Sawtooth waveform generator
 
by slacker  
 
Reverb + Shimmer (Version 6)
 
by Alex Lawrow  
1 comment
This routine is based on Mick Taylor's (Ice-9s) reverb loop and shimmer code with some changes such as... 
Slocum Phase Shifter
 
by Doug Slocum, Spin Semi  
2 comments
From GA_DEMO - mods by Doug Slocum 10/20/2017 
Geoffrey: Pitch shifted delay
 
by slacker  
Pitch shift is +5th, +7th, +1 Octave, +M3rd 
 
by slacker  
 
 
by slacker  
 
Digifuzzer
 
by slacker  
 
 
by slacker  
 
Envelope Phaser
 
 
Filter: env LP HP up
 
 
 
 
Pitch Step Glider.spn
 
 
Random Loop Delay
 
 
 
 
Ring Pitchulator
 
by David Rolo  
1 comment
 
 
 
 
 
 
 
Ping Pong Delay
 
by Frank Thomson  
 
Soft Clipping Overdrive
 
by Jeroen Korterik  
 
Improved Octave Up
 
by Don Stavely  
1 comment
This solves for the 'crossfade cancellation' issue... 
Minimal Reverb - no controls
 
 
 
7-Band Parametric EQ
 
 
 
 
by patb, Don Stavely  
 
Slow Gear (simple)
 
by Alex MAK  
 
 
 
 
Tremolo w/ Multiple LFO Waveshapes
 
by Slacker  
2 comments
 
Tremolo w/ Multiple LFO Waveshapes (no clicks)
 
by Slacker, mstratman  
2 comments
 
Whammy
 
by deepMago!  
 

Questions, additions, corrections, feedback?