SAM5504. Effects RAM. serial Flash. 3 bands Tone Control + Presence. Amp Modeling

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Linda Dana Gregory
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1 0GTFX Guitar Multi-Effect Module with USB Firmware for SAM0 1. Overview The SAM0, driven by the firmware 0GTFX-USB described in here, is a fully USB-MIDI controllable high quality Multi-Effect Device, especially made for Guitar FX applications. The SAM0 includes a Microcontroller and four -bit DSP engines, up to 0Kx embedded RAM and secure efuses for code protection. It provides digital interfaces for serial data input and output, a built-in USB device controller, built-in 10-bit ADC for analog inputs like potentiometers and sliders, and plenty of general IO pins for direct connection of user interface controls (switches, LEDs, Graphic-Display etc.). User Interface controls SAM0 DAC Audio Out ADC Effects RAM USB.0 to Computer etc. serial Flash 1.1 Signal Processing Synoptic All Effect modules shown in the signal processing synoptic below are processed by SAM0 and can be used at same time: Guit In Compressor Limiter Noise-Gate Wah-Wah Pedal Simulation Auto-Wah LFO-Wah HQ Distortion Tube Simulation bands Tone Control + Presence Modeling Pitch- Shifter + Feedback Suppressor 1 bands Parametric Equalizer / Cabinet Modeling Reverb Delay Mod-FX M i x Out 1. Features Multi-Effects module, different configurations (fully user configurable): o stereo HQ-Reverb, mono or Ping-Pong Delay o Mod-FX: stereo Chorus, Flanging, Phaser, Tremolo, Vibrato, Panning o Modeling with -stage HQ Distortion algorithm and parametric Equalizer o 1 bands Parametric Equalizer on outputs, can be used for Cabinet Modeling and for adaptation to frequency response of Guitar loudspeakers USB Audio Class compliant interface (USB MIDI device) for control of all effect parameters Reference Design 0FX-EK and 0GTFX_Control.exe software for Effect customization available Dream S.A.S.

2 . Multi Effect Presets A Multi Effect is a combination of Effect Presets of the different blocks (see chapter ) and Front Panel Knob settings. Presets are selected through MIDI NPRN Fh nn (nn: preset number, from 0 to ) or by Front panel hardware selector. Nb Name Preset defaults values Drive Volume Bass dle Treble RevDel ModFx Inp Preset Wah Preset preset Pitch Preset ModFx Rev/Del Cabinet PEQ Preset 0 Bypass Clean Chorus Super Clean Luxe Tremolo Twin Reverb Bass Tremolo Twin Small Reverb Rock Solo Rock Phaser Ang Rod Fusion Solo Metal Wah Metal Flanger Champ Clean Rockabilly Luxe flanger Funky way Rock Noise Rock Vintage Twin Twin Base British Super Americain Metal Champ Prince British 0 Bristish Note: All Multi-Effect settings can be customized by use of 0GTFX Software Control Panel. 01 Dream S.A.S.

3 . Effect Presets Some presets have been predefined for each effects: Wah-Wah, Compressor, -Model, Pitch Shift, Mod-FX (Chorus etc), Reverb, Delay and Cabinet PEQ. Presets are selected through MIDI NRPN messages. All these Effect settings can be modified by use of 0GTFX Software Control Panel..1 Input Processing Presets Preset is selected by using MIDI NRPN 0Fh nn nn: preset number, from 0 to 9 Nb Name NG Release Noise Gate NG Threshold ON Slow Attack Compressor Threshold Ratio Attack Release Boost 0 Flat COMPRESSOR 1: -18dB : COMPRESSOR : -1dB : COMPRESSOR : -18dB : COMPRESSOR : -1dB : COMPRESSOR : -db 1: LIMITER 1: -db LIMITER : -1dB LIMITER : -18dB Compressor Stomp Box Wah-Wah Presets Preset is selected by using MIDI NRPN 0Fh nn nn: preset number, from 0 to Nb Name Preset Default values Decay Manual Auto Wah Sens Filter Q LFO Amount LFO Rate Mode Filter Type 0 OFF / / / / / / / 1 Auto-Wah Auto-Wah Wah LFO Wah LFO Model Presets Preset is selected by using MIDI NRPN 09Fh nn nn: preset number, from 0 to 1 Nb Name Type Preset Default Values Drive Center Drive Min Drive Max Freq Freq Freq Freq Quality Quality 0 OFF / / / / / / / / / / / / / / / / 1 Twin Twin Luxe Base Min Max Min Max Min Max Lo- Cut Hi- Cut 8 9 Thrift 0 British 80 Super Americain Metal Dream S.A.S.

4 Champ Prince Luxe British Watt British 0 British 0 British Color Cabinet-Model-PEQ Presets Preset is selected by using MIDI NRPN 0BFh nn nn: preset number, from 0 to 8 Nb Name In 1 Freq1 Q1 Freq Q Freq Q Freq Q Freq Q 0 OFF X1V X1G X1M BSEMN LX SUP X1C Continued for frequency points till 10: Nb Name Freq Q Freq Q 8 Freq8 Q8 9 Freq9 Q9 10 Freq10 Q10 0 OFF X1V X1G X1M BSEMN LX SUP X1C Continued for frequency points 11 till 1: Nb Name 11 Freq11 Q11 1 Freq1 Q1 1 Freq1 Q1 1 Freq1 Q1 1 Freq1 Q1 0 OFF X1V X1G X1M BSEMN LX SUP X1C Dream S.A.S.

5 . Pitch Shift Presets Preset is selected by using MIDI NRPN 0Fh nn nn: preset number, from 0 to Nb Name Preset Default values Coarse Tune Fine tune Dry/Wet-Mix Filter Frequency Resonance 0 OFF / / / / / 1 Light Detune 1 0 Medium Detune Deep Detune 1 0 Octaver 0 0 Feedback Suppressor Reverb/Delay Presets Preset is selected by using MIDI NRPN 0Fh nn nn: preset number, from 0 to 1 Nb Name Preset Default Values Type Rev PreHP PreDelay TimeRev HDamp Tone ToneFreq Del PreLP TimeDel Feedback 0 OFF / / / / / / / / / / / / 1 Small Hall Large Hall Small Room Large Room Small Plate Spring Ping-Pong Delay Tape Delay Delay + Reverb Stereo Delay + Reverb Long Delay Short Delay Mod-FX Presets Preset is selected by using MIDI NRPN 0Fh nn nn: preset number, from 0 to 1 Presets Defaults values Nb Name Tremolo PreHP DelTime Feedback Rate Depth HDamp Type Shape 0 OFF / / / / / / / / / 1 Sine Chorus Deep Chorus Vintage Tremolo Sine Tremolo Phaser Slow Step Phaser Flanger Vibratone Vibratone Deep Flanger Deep Phaser Fast Tremolo Fast Dream S.A.S.

6 . NRPN Controls MIDI Non-Registered-Parameter-Number can be used to control precisely each parameter of each effect. NRPN's are sent through (or ) midi controls: - select first NRPN MSB: MIDI control 99 (MIDI message BxH H nnh) - then select NRPN LSB: MIDI control 98 (MIDI message BxH H nnh) - then send NRPN Value: MIDI control (MIDI message BxH 0H nnh) - if want send parameter in high precision, the parameter LSB value can be send through MIDI control 8 (MIDI message BxH H nnh). NRPN NRPN Description MSB LSB General Effect Controls (also used on Front Panel as hardware controls) 0Ah 00h Drive control: 0 = min = default till 1 = max 0Ah 01h Volume control (post Distortion): 0 = min = default till 1 = max 0Ah 0h Bass control: 0 = min = default till 1 = max 0Ah 0h dle control: 0 = min = default till 1 = max 0Ah 0h Treble control: 0 = min = default till 1 = max 0Ah 0h Mod-FX control: 0 = min till 1 = max 0Ah 0h Reverb/Delay control: 0 = min till 1 = max Input Processing Controls 08 0h Input gain: 0=-inf 90=0dB (exceeding this value may cause clipping) 1=+dB 08 0h Noise-gate Threshold: 0 = off, 0x0100 = -db... 0xF00 = -db. (Step = -0.dB) 08 0Ah Noise-gate Release time: 0=~10ms... 0xFFF=~10s 0 00h Compressor ON/OFF: =0 OFF, else ON 0 01h Attack time: 0=fast attack (0.1ms), 0=1ms, 100=10ms, till 1=slow attack (100ms), exp. curve 0 0h Release time: 0=fast release (10ms), 0=100ms, 100=1s, till 1=slow release (~s), exp. curve 0 0h Threshold: 0=-., 1=-dB, =-1.dB, Eh=-0.dB, Fh=0dB 0 0h Ratio: 1=1:18, 1=:18 (1:), 1=:18, =:18 (1:), 0=1:1 0 0h Boost (applied on signal after compression): 1= x8 =x =x 0 = x1 0 0h Knee: 0=Hard Knee, else Soft Knee Wah-Wah Controls 0 00h Wah-Wah ON/OFF: =0 OFF, else ON 0 01h Mode: 0=UP, 1=DOWN, =UP-EX, =LFO-MOD 0 0h Filter resonance: 0 = no resonance, till 1 = max resonance 0 0h Filter type: 0 = low pass filter, 1 = band pass filter 0 0h LFO Rate: 0 0h Auto-Wah Sensitivity: (0=OFF, till 1=100%) 0 0h LFO Amount: (0=min, till 1=max) 0 0h Manual / Pedal Position: 0 = closed 0Hz, till 1 = open 8kHz 0 08h Decay : 0=fast release (10ms), 0=100ms, 100=1s, till 1=slow release (~s), exp. curve Model Controls 08 0h Lo-cut filter frequency: (0 = ~0Hz, till FFFh = ~00Hz) 08 0h Hi-cut filter frequency: (0 = ~1.KHz,...100=~KHz, till FFFh = OFF) 0 1h Distortion Type 0 0h Drive default point for Drive control: 0= 0% till 1 = 100% 0 h Drive min point for Drive control: 0= 0% till 1 = 100% 0 h Drive max point for Drive control: 0= 0% till 1 = 100% 09 0h EQ band gain default point for Bass control : 0=-1dB, =0dB, 1=+1dB 09 0Fh EQ band gain min point for Bass control : 0=-1dB, =0dB, 1=+1dB 09 10h band gain max: 0=-1dB, =0dB, 1=+1dB 09 0h - band gain: 0=-1dB, =0dB, 1=+1dB 09 11h - band gain min: 0=-1dB, =0dB, 1=+1dB 09 1h - band gain max: 0=-1dB, =0dB, 1=+1dB 09 0h - band gain: 0=-1dB, =0dB, 1=+1dB 09 0h band gain: 0=-1dB, =0dB, 1=+1dB 09 1h band gain: 0=-1dB, =0dB, 1=+1dB 09 1h band gain: 0=-1dB, =0dB, 1=+1dB 09 08h band frequency: 0=0Hz, till 1=1.KHz 01 Dream S.A.S.

7 09 09h - band frequency: 0=0Hz, till 1=,KHz 09 0Ah - band frequency: 0=0Hz, till 1=10KHz 09 0Bh band frequency: 0=00Hz, til1=khz 09 0Dh - band Q: 0= = = Eh - band Q: 0= = = h output 0= 0% till 1= 100% Pitch-Shift Controls 0 00h Pitch shift tune Coarse tune (data entry control ): = -1 half tones, = -11 half tones,, =-1 half tone, =0, =+1 half tone, =+ half tones,, =+1 half tones 0 01h Fine tune (data entry control 8): 0= no detune 1= +1 half tone 0 0h Pitch shift Filter frequency: 0 = closed, till 1 = open (0 to 8kHz) 0 0h Pitch shift Filter resonance: 0 = no resonance, till 1 = max resonance 0 0h Pitch shifted / direct signal balance: 0=only direct signal, till 1=only pitched signal 0 0h Pitch Shifter ON/OFF: =0 OFF, else ON Reverb Controls 0 0Ah Reverb ON\OFF 0 09h Reverb Type 0 00h Reverb 0 01h Reverb Pre-Delay time: 0 = 0ms, till 1 = 1ms 0 0h Reverb Time 0 0h Reverb Tone control gain: 0 = -1dB, till 1 = +db, default is = 0dB 0 0h Reverb Pass Filter on input: 0 = no filter to 1. khz 0 0h Reverb HDAMP: high frequency filter on reverb decay / echo feedback 0 to 100 % 0 0h Reverb Tone Frequency Delay Controls 0 10h Delay 0 11h Delay Time 0 1h Delay Feedback 0 1h Pre Pass Filter: 0 = no filter to 1. khz Mod-FX Controls 0 00h Effect level 0 01h Chorus/Flanging delay time: 0 = 0.ms, till 1 = 0ms 0 0h Chorus/Flanging delay feedback 0 0h Chorus/Flanging high pass filter on input: 0 = no filter to 1. khz 0 0h HDAMP: high frequency filter on delay feedback 0 to 100 % 0 08h Modulation rate: 0 = ~0,0 Hz, =~0,89Hz, till 1 = ~,8 Hz (~1Hz to ~0Hz for Tremolo) 0 09h Modulation depth 0 0Ah Tremolo modulation shape: 0 = triangle, till 1 = square 0 0Bh Mod-FX mode: 0=Chorus, 1=Flanger, =Phaser, =Tremolo, =SineChorus, 0 0Ch Mod-FX ON/OFF : 0=OFF, else ON Cabinet PEQ 0Bh 0h PEQ Input 0Bh 1h PEQ ON/OFF: 0 = OFF, else ON 0Bh 00 to PEQ band (1 to 1) 0= -1db... =0dB... 1 = 1db 0Eh 0Bh 10h to PEQ band (1 to 1) Frequency 0= 1 Hz till 1 = 1 khz 1Eh 0Bh 0h to Eh PEQ band (1 to 1) Quality 0= 1 till 1 = 0 When receiving input peak level request (NRPN 800h), SAM0 returns current input peak level through following NRPN message: 0xB0, 0x, 0x08, 0x, 0xF, 0x0, vv vv is the input level in db, range from 0h till h as follow: 0h=no level, 1h=-dB, h=-db, 10h=-8db, 0h=-dB, 0h=-1dB Fh=-1dB, 0h= 0dB, 1h= +1dB, h=+db,, h=+db, h>=+db Peak level correspond to maximum level detected between consecutives "peak level request" NRPN s. Recommended time between consecutives "peak level request" NRPN s is about 100ms. This time should never be lower than 0ms to avoid MIDI data input buffer overrun. 01 Dream S.A.S.

8 Rev PreHP Parameters Preset numbers Reverb/Delay Pre-delay TimeRev HDamp Tone Tone Freq Appendix: Effect Preset Hierarchy Del Pre Pass Filter TimeDel FeedBack Mod-FX Input Processing Pre Hi Pass Filter Delay Time Feedback Modulation Rate Depth -Damp Pre Pass Filter Tremolo shape NGate Threshold NGate Release C/Slow ON/OFF Threshold Ratio Release Boost Multi-Effect Preset Wah-Wah -Mod Decay Manual Sensitivity Resonance LFO Amount LFO Rate Mode Filter Type Lo-Cut Hi-Cut Type Drive Drive Min Drive Max s Frequencies Q Min s Max s Output 8 01 Dream S.A.S.

9 Pitch Shift Cabinet-PEQ Fine Tune Frequency Resonance Mix 1 s 1 Q 1 Frequencies Dream Contact info@dream.fr Website This publication neither states nor implies any warranty of any kind, including, but not limited to, implied warrants of merchantability or fitness for a particular application. Dream assumes no responsibility for the use of any circuitry. No circuit patent licenses are implied. The information in this publication is believed to be accurate in all respects at the time of publication but is subject to change without notice. Dream assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the information included herein Dream S.A.S.

About the Sens it Payload

About the Sens it Payload Payload structure 4 bytes 8 bytes Mode values Configuration values (optional) If the message is an uplink only frame, the payload contains only the 4 bytes of mode values. If