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http://midi-overdrive-switcher.becosfx.com

 

 

Settings 

 
Several settings can be made from inside the pedal. Open the back lid and you will have easy access 
to hardware settings (and customization options such IC or clipping diodes replacement).  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

MIDI Receive and MIDI Transmit Sockets 

 
Inside the pedal there are two small 4-pin sockets: one socket is for MIDI Receive function (factory 
default) and another for MIDI Transmit function. The external 5-pin MIDI connector is connected to 
the circuit board on one socket or the other, through a 4-wire jumper cable. Only one function can be 
used at a time. You may use a standard MIDI cable to connect to your other MIDI devices externally, 
for either function: transmit or receive.  
 

Note:

 Because TS8-MS is not configured with a second external MIDI connector for MIDI Through 

function,  you  will  have  to  place  it  last  in  your  chain  of  MIDI  devices  that  needs  to  be  MIDI 
controlled. Be sure the MIDI signal inside pedal goes from/to the appropriate socket on the circuit 
board. 

 

Multi Function Switch 

 
This rotating switch has 16 positions and performs multiple functions:  
 

1.

 

It sets the Receive/Transmit  MIDI Channel and maps a particular switching 
pattern to Effect/Bypass/Extended pedal states, for the two isolated relays 
performing external switching, when footswitch is pushed.  

 

1. 

Audio Op-Amp IC socket 

2. 

External MIDI connector - used for MIDI Receive or 

MIDI Transmit 

3. 

Custom Clipping sockets - default with LED's 

4. 

MIDI Jumper Cable - couples to MIDI RX or TX 

sockets, setting the MIDI Receive or Transmit function 

of the pedal 

5. 

Multi Function switch, which is used to set: 

- MIDI Channel for Receive or Transmit functions  

- Switching Pattern for External Switching Relays 

- Setup  

6. 

MIDI Transmit socket 

7. 

MIDI Receive socket (default connected) 

Summary of Contents for TS8-MS Overdrive Midi Switching

Page 1: ...trol 11 Tone Control 12 Output Level Control 12 LED Indicators 12 Footswitch Action 12 DC Power Supply 14 Ways to Use TS8 MS MIDI Overdrive Effect Pedal 14 Using TS8 MS as analog overdrive and amplifier channel switcher on footswitch action 15 Using an external MIDI Controller to control TS8 MS analog overdrive and switch amplifier s channels 16 Receiving Program Change MIDI messages 17 Receiving ...

Page 2: ...cal servicing must be carried by qualified service personnel only Warranty The product is covered by 2 years direct manufacturer limited warranty for electronic circuits and 90 days for footswitch potentiometers Cosmetic issues arising from normal product usage are not covered Warranty period starts from the date of initial purchase Warranty is lost if product ownership is transferred from origina...

Page 3: ... sealed relays used for pedal True Bypass and External Switching 2 relays linked to a stereo 1 4 TRS connector can be used to switch guitar amplifier s channels Customization friendly swap IC clipping semiconductors and indicator LED s Technical Specifications Input impedance 500KΩ Output impedance 10KΩ Battery optimal working voltage 8 10 VDC 9 V alkaline battery recommended DC Power connector po...

Page 4: ...n footswitch action TS8 MS transmits three MIDI Program Change numbers one for each pedal state Bypass Effect and Extended With TS8 MS you have a quality tubescreamer guitar effect and a guitar amplifier channel switcher with 2 independent relays both functions being MIDI or Footswitch controlled This pedal can sit not only under your foot but also in a rack drawer The analog overdrive sound can b...

Page 5: ...connector for MIDI Through function you will have to place it last in your chain of MIDI devices that needs to be MIDI controlled Be sure the MIDI signal inside pedal goes from to the appropriate socket on the circuit board Multi Function Switch This rotating switch has 16 positions and performs multiple functions 1 It sets the Receive Transmit MIDI Channel and maps a particular switching pattern ...

Page 6: ... external switching uppon footswitch action Usually when controlling pedal with an external MIDI Controller you won t care for what switching relays the footswitch would control The same accounts for MIDI Receive or transmit since you cannot use both functions at the same time you only pick the MIDI Channel for whatever function trannsmit or receive you need to use with TS8 MS in your rig If you w...

Page 7: ...table through the 16 position Multi Function switch All switching patterns are covered for these two pedal states and you can pass from any External Switching Relay combination to another External Switching Relay combination For Extended Mode pedal state however only 16 complementary External Switching Relay combinations are possible in relation to Bypass Effect states and this is a limitation imp...

Page 8: ...itching Relay 1 External Switching Relay 2 External Switching Relay 1 External Switching Relay 2 External Switching Relay 1 External Switching Relay 2 0 16 OMNI Off Off Off Off On On 1 1 1 Off Off On Off Off On 2 2 2 Off Off Off On On On 3 3 3 Off Off On On On Off 4 4 4 On Off Off Off On On 5 5 5 On Off On Off On On 6 6 6 On Off Off On Off Off 7 7 7 On Off On On Off On 8 8 8 Off On Off Off On Off ...

Page 9: ...er up the pedal from battery or external power adapter hold the footswitch for 3 more seconds until the LED s are lit as indicated release the footswitch to save this setting power off pedal The pedal is now set to True Bypass With power off set the Multi Function switch to another desired position function then close the pedal power it on again and start using it Set Latching Switching for Extern...

Page 10: ...other i e Relay 1 was commanded On when pedal was in Bypass and must be On again when pedal passes to Effect a new momentary command CANNOT be logically executed NOR seen by the amp This is because for either one of the On or Off switching relay state execution the same 100ms momentary ON command is issued in this mode of switching so inevitably the relay logic state in TS8 MS is always alternatin...

Page 11: ...other type of diodes here Gain Control This knob controls the amount of gain added to the input signal It s control is logarithmic which means you will have to dial it further for higher gain but provides a very fine control in the lower setting where it exhibits a cleaner sound Depending on the chosen clipping mode a range of dynamic and smooth driven tones may be obtained Higher settings reveal ...

Page 12: ...It merely acts like a low high cut filter yet it has a strong impact on the distortion structure especially on the higher frequency side when dialed clockwise Turned counterclockwise it will cut the higher frequencies revealing more lows Around the middle signal is untouched The best corrections will compensate for different guitar pickup and amp characteristics in between ten and two o clock Outp...

Page 13: ...MIDI devices For example you may want a clean tone without overdrive in front of the amp s clean Channel but then engage the overdrive and simultaneously switch amp channel to crunch ultimately you may switch to a third amp s Channel for a lead solo while either preserve the overdrive or not depending on what switching pattern you have selected through the Multi Function switch Previous pedal stat...

Page 14: ...8 MS require a certain voltage to operate properly If battery or DC power gets bellow 7V during pedal usage a brown out procedure is initiated with the following actions and consequences relay s Red LED s will start flashing to indicate relay switching is no longer possible because battery has low voltage and it needs to be changed audio signal is switched and locked in Bypass until battery voltag...

Page 15: ...l switcher on footswitch action The Multi Function switch inside the pedal sets the External Switching Relays pattern when overdrive effect is enabled or Bypassed using the main footswitch Of course if other features can be switched externally in an amplifier you can use the relays for switching these features ex reverb EQ stage solo boost etc In the picture bellow TS8 MS Overdrive pedal is used t...

Page 16: ...he amp s switching circuit When relays are in ON setting the corresponding LED s will lit to indicate relay state Using an external MIDI Controller to control TS8 MS analog overdrive and switch amplifier s channels Program Change PC and Control Change CC messages are supported by TS8 MS An external MIDI Controller like Rocktron Midi Mate or Vodoo Lab Ground Control Pro or any other programable MID...

Page 17: ...on results meaning all relays are switched on and or off with each command received All commands are executed fast one by one in series in order they came in TS8 MS pedal is pre programmed to respond to the following Program Change numbers Program Change Number Bypass Effect Relay Switching Relay 1 Tip To Gnd Switching Relay 2 Ring To Gnd 50 Bypass Off Off 51 Bypass On On 52 Bypass Off On 53 Bypas...

Page 18: ...nied by an on off value usually alternately switched However other simpler MIDI Controllers do not have assignable momentary on off physical buttons yet they can be programmed to send MIDI Control Change messages along with Program Change messages In our case when TS8 MS receives a certain CC number with a value between 0 63 it switches one or more relays OFF the same CC number with a value betwee...

Page 19: ...these simple and solitary MIDI commands or a group of MIDI commands in series as is the case when a preset change occurs When multiple CC commands are transmitted as a series of MIDI commands within a preset change which puts the TS8 MS in a certain state where each relay has a position on or off please note that if you power off pedal and then on again only the very last MIDI command will be reca...

Page 20: ...t anything but the back cover of the pedal so we encourage you to experiment Here are some IC s to try RC4558D P warm saturation classic tubescreamer sound used by most manufacturers TLC2272 low noise gentle musical clipping good for hi gain crunch OP275 very clean low noise with nice recovery from clipping OPA2604 low distortion quiet gentle clipping a bit darker sounding Other TL072 NE5532 LM833...

Page 21: ...the circuit board apart to swap the LED s Please note that some LED s might be brighter or fainter than other and you may need to set the brightness to match them altoghether by adjusting the corresponding current limiting resistors R210 for Relay 1 LED default Red R211 for Relay 2 LED default Red R212 for Effect Bypass LED default Green R213 for the Midi Function LED default Yellow Important When...

Page 22: ... to other devices might be interpreted by the pedal MIDI response has some latency Set a dedicated receiving MIDI Channel for pedal Try to program transmitted presets with less MIDI messages For example if you only intend to use three CC commands within a preset be sure your controller does not transmit more of them deactivate the ones not used MIDI commands are bursting If you send commands from ...

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