Roland GR-55 Normal-Guitar P7 & P5 (Safe) adapter cable

The cable that turns a GR-55 into a high quality normal-guitar effects unit.
FEATURES:
* P7 normal-guitar input and P5 for PCM 'String A' PCM voice triggers.
* Allows external normal-guitar buffer use for exceptionally high GR-55 audio quality, with a straight analog-to-digital guitar signal path. GR-55 does not have a P7 input buffer circuit btw.
* Typical Boss pedal input buffer to GR-55 output specifications:
Noise-Floor -94.39dB. Harmonic Distortion: 0.00874% THD.
A custom gain-stage buffer pedal can register a -104dB noise-floor.
Hi-end project guitar buffer schematic:
separate-strings.co.uk/bufferschematic.png
* GR-55 normal-guitar re-amping via a DAW interface @ -27dB signal out. Hands-Free normal-guitar & P5 PCM voice patch changing. No more 'play a bit, adjust a bit' tone-search.
Finally, for those who might be thinking a GK3 normal-guitar input is ok to use, please consider GK3's poor unscreened normal-guitar buffer circuit, GK cable length and +7dB GR-55 power supply ripple, and bad audio!
Thanks for viewing,
Bill
separate-strings.co.uk

[@pafreformas2699]

by the way... You always made a Wonderfull job for us, GR-55 lovers!

[@plexidust5101]

Outstanding Solution ! Now, with Just a Boss Tuner, I can plug in with a regular guitar chord and go without a GK-3 needed. Gig the unit as a Bass rig, Full Guitar rig with all the modeling AND have PCM tones if I want them. FANTASTIC Feature !

[@BaxBreakoutBox]

Hi, You will have access to normal-guitar tones and effects, but only monophonic Pin 5 GR-55 synth voices (no poly). A Boss tuner will make an excellent guitar buffer. separate-strings.co.uk

[@joe032391125]

Wow, this is great! Is it possible to ship to Australia?

[@BaxBreakoutBox]

Hi, No problem shipping to Australia. Email me at the website to start an order. Regards, Bill. separate-strings.co.uk

[@darionovak2477]

greeting please inform me where I can buy or get that cable you showed in the tutorial?? And what is the name of the cable? greeting!!

[@BaxBreakoutBox]

Hi, You can order the cable from me direct at separate-strings.co.uk The name is 'GR-55 P7/P5 adapter cable'. Regards, Bill.

[@andreikantsevich1976]

HI, Will it work for the VG-99 via the WL-60 wireless system? With respect

[@BaxBreakoutBox]

Hi, The VG-99 already has a normal-guitar input, and no need for a GR-55 normal-guitar adapter cable.

[@youfilin]

It's amazing. Using GR-55 for years and want use it with another guitars with standard pickup. Is it possible to exclude PIN 5? I only need PIN7.

[@BaxBreakoutBox]

Hi, No problem leaving out P5. It was only added because a few people asked about it. Alternatively, you can switch off P5 or P7 in a patch. Regards, Bill separate-strings.co.uk

[@obedmorales916]

Will it work with a wireless sistem conected to gk pick up , and another to the device?

[@BaxBreakoutBox]

Hi, It will work with a wireless system connected to a buffer pedal > cable adapter > GR-55. A GK pickup preamp like a GK3 is not used. The cable is all about access to P7 normal-guitar, which the GR55 does not have. The advantages are obvious, as you can use the GR-55 as a complete effects unit, plus take advantage of a clean normal-guitar input. Ideal for studio recording, and a much better specification compared to a multi-effects unit.

[@salamalaseel561]

Hi this is amazing . Please do you ship to US and do you have longer cable . Thanks a lot

[@BaxBreakoutBox]

Hi, No problem shipping to the US. We can talk about a longer cable through email. Thanks for the message. Bill. separate-strings.co.uk

[@MarcusViggo]

Hey Man, Im a big fan of your projects, are you selling this? or any schematics to I made it myself? Its super interesting mod and I have the tools to make it.

[@BaxBreakoutBox]

Hi, If you want to make the cable, check out the v-guitar forums and search for 'phantom power' pin 8. You will find the basic P8 volume resistor network schematic (thanks to Steve Conrad btw). The circuit delivers approximately 5VDC to GR-55 P8 'volume level. Next is P7 normal guitar input, using a standard well-screened guitar cable. Conductor goes to P7 and cable screen to DIN shell. For a monophonic GR-55 synth voice, connect a 100 ohms resistor from P7 to P5. The resistor offers a basic buffer between P7 & P5. P5 'String A' has the widest GR-55 note recognition of all string signal inputs. The cable is available for purchase at £30.00GBP, plus shipping. The two hidden advantages with using the adapter cable input, is external user buffer pedal choice, and a clean input path to the GR-55's A-D. In tests, the GR-55 harmonic distortion is much lower compared to a Boss GP-10 or a GT1 pedal. And of course the signal-to-noise ratio (with a hi-end external buffer circuit) can register a -100dB noise-floor. Optional hi-end DIY guitar buffer circuit schematic. www.separate-strings.co.uk/bufferschematic.png

[@MarcusViggo]

Man, you are the BEST, Thank you!@@BaxBreakoutBox

[@pafreformas2699]

Can I Use the GR-55 guitar simulations ( fenders, gibsons,...etc) I love the simulations but I hate GK-3...lol

[@BaxBreakoutBox]

Hi, GR-55 guitar emulations (strat, Les Paul etc) are not available with the cable, but guitar effects are available with a normal-guitar adapter cable input. The normal-guitar input audio improvement is noticeable, compared to a Boss GP-10 & GT1 multi-effects guitar input. A technical explanation is mentioned in an earlier post. The cable is available for purchase at £30.00GBP. Thanks Bill, www.separate-strings.co.uk

[@I_ffoo]

Hello, can you make a cable for me and send it? I am from Saudi Arabia I also have a question: Can all the sounds on the Gr-55 be played?

[@BaxBreakoutBox]

Hi I_ffoo, Do not see a problem with UK-Saudi Arabia shipping, need to check. Yes, you can play all the GR55 PCM sounds using a normal guitar input, BUT you can only input a single string guitar input or a mono input. The main attraction with the cable, is using a GR55 as a normal guitar effects unit. Btw, the GR55 has the cleanest of all Roland/Boss v-guitar normal-guitar inputs, and that's why I am so enthusiastic about the cable. Regards, Bill separate-strings.co.uk

[@I_ffoo]

How can I order this cable? I want two, and the cable length is one meter for each cable

[@BaxBreakoutBox]

@@I_ffoo Hi, Having just checked, shipping to Saudi has risks. Last month I gave instructions on the cable... "Hi, If you want to make the cable, check out the v-guitar forums and search for 'phantom power' pin 8. You will find the basic P8 volume resistor network schematic (thanks to Steve Conrad btw). The circuit delivers approximately 5VDC to GR-55 P8 'volume level. Next is P7 normal guitar input, using a standard well-screened guitar cable. Conductor goes to P7 and cable screen to DIN shell. For a monophonic GR-55 synth voice, connect a 100 ohms resistor from P7 to P5. The resistor offers a basic buffer between P7 & P5. P5 'String A' has the widest GR-55 note recognition of all string signal inputs. The cable is available for purchase at £30.00GBP, plus shipping. The two hidden advantages with using the adapter cable input, is external user buffer pedal choice, and a clean input path to the GR-55's A-D. In tests, the GR-55 harmonic distortion is much lower compared to a Boss GP-10 or a GT1 pedal. And of course the signal-to-noise ratio (with a hi-end external buffer circuit) can register a -100dB noise-floor. Optional hi-end DIY guitar buffer circuit schematic. www.separate-strings.co.uk/bufferschematic.png

[@bolesawgilewicz7786]

👍👍👍

[@deograciascaubang2221]

I would like to order that gr55 normal adapter cable. I'm from Philippines. How much would it cost including the shipping fee?

[@BaxBreakoutBox]

I cannot ship to the Philippines, but you can make one for yourself. Go here christopher-j.net/roland-gk-13-pin-to-%C2%BC-inch-guitar-cable-adapter/ The person shows the basic connections for the adapter cable. P5 PCM triggers need a 100ohms resistor between P7 to P5. There is more on the Facebook GR55 page. Do have a look. Btw, Do not follow those videos with people connecting -7VDC to ground shield. They are totally stupid and dangerous. Thanks, Bill

[@danilo1615]

without a gk3? wow, how is this possible? could it work on an electric violin as well?

[@BaxBreakoutBox]

Hi, It will work with an electric violin, but string inputs must be single string or mono to trigger GR-55 PCM sounds. Adapter cable access to Pin-7 normal-guitar turns the GR-55 into a high quality effects unit. Cable price is £30.00GBP. Thanks, Bill separate-strings.co.uk

[@miguelamirelessr8645]

hi good job I question have GR 33 adapter cable working for GR 33? Tanks for you help and time God Bless You

[@BaxBreakoutBox]

Hi miguelamirelessr8645, If the GR33 has a normal-guitar P7 input from a GK3 type preamp/pickup, the adapter cable will work as claimed here. I am not familiar with the GR33 btw.

[@dmitrygit3420]

Hi, have you tried to use a roland gr or vg with powerbank or battary as portable ?

[@BaxBreakoutBox]

Battery power will improve GR-55's noise-floor by at least 2-3dB. Good comment.

[@jaroslawglut]

Can you make a cable for me and send it to Ireland?

[@BaxBreakoutBox]

Sorry, Brexit export rules have damaged small businesses like mine. The cable is quite simple to make, why not have a go? I posted instructions in a message a couple of weeks back.

[@jaroslawglut]

Thank you for your response.👍🎸

[@intothemusic7121]

Great job. Do you ship to Italy?

[@BaxBreakoutBox]

Hi, Sorry, due to small business red tape Brexit rules, shipping to EU is not worth it. What a stupid government we have in the UK. Regards, Bill

[@brenthigley4105]

Where can I get one or how do I make one?

[@BaxBreakoutBox]

As far as I know, it's only available from myself. Making one is easy when you know how. Visit the v-guitar forums. DO NOT make one from instructions shown here on youtube, as some are suggesting a voltage pin goes to ground:( separate-strings.co.uk

[@josephanderson3254]

Where could I get one of these cables at is it special made

[@BaxBreakoutBox]

Hi Joseph, Sorry for the late reply. No problem supplying the GR55 adapter cable. Email me at the separate-strings.co.uk website to get the order going. Thanks, Bill

[@vethasupermenan3485]

Give me link to buy this cable.

[@BaxBreakoutBox]

Hi, Where are you based?

[@shironperera6635]

i want to buy this adapter. please anyone can provide me with a legit place to buy this adapter?

[@BaxBreakoutBox]

Hi, It appears I am the only outlet for the cable, and it's priced at £30.00GBP. Where are you based? You can email at separate-strings.co.uk Thank you, Bill

[@obedmorales916]

How much is the cable adapter?

[@BaxBreakoutBox]

Hi, £30.00GBP plus shipping. US is around $38.00 USD plus.

[@Keeper_Arts]

i don't understand this very well. what's this doing ?

[@BaxBreakoutBox]

Hi, The cable provides a direct input to GR-55 pin-7 normal-guitar, without any case drilling or modification etc. P5 is also included and allows simple GR-55 PCM mono voice trigger from a normal-guitar input. Thanks, Bill. separate-strings.co.uk

[@melodycentral7883]

Hi do you ship to Singapore and what’s the total cost?

[@BaxBreakoutBox]

Hi, The cable is priced at £30.00GBP. Tracked and signed shipping to Singapore I need to check. Maybe £15.00GBP. If you are serious, visit the website separate-strings.co.uk and we can start an email chat. Thanks, Bill

[@melodycentral7883]

@@BaxBreakoutBox awesome! Just another question, how’s the piano tracking? Is it good with this cable?

[@BaxBreakoutBox]

@@melodycentral7883GR-55 piano tracking is terrrible, everybody knows that. Also P5 is only mono, so you cannot play more than a single string. GR-55 tracking is ok with strings and pads, but forget articulated instruments. P7 GR-55 normal guitar is excellent with a buffer pedal.

[@katasiapa]

I need this, where to buy this

[@BaxBreakoutBox]

Hi, Where are you based? The GR-55 adapter cable is priced at £30.00GBP, with postage on top. Regards, Bill. separate-strings.co.uk

[@thierryolimac4403]

Where can we get this cabke pkease ?

[@BaxBreakoutBox]

Hi, If you are based in the EU, you are out of luck due to Brexit red tape. If elsewhere, you can email me at separate-strings.co.uk. Regards, Bill

[@thierryolimac4403]

@@BaxBreakoutBox sad ....im in france

[@BaxBreakoutBox]

@@thierryolimac4403 Hi Thierry, Not to worry, if you have or anyone you know has good soldering skills, the cable is quite easy to make. Send me an email, and I will try to help out. Also, here is the reason why the GR-55 has an excellent normal-guitar input. separate-strings.co.uk/gr55adpath.jpg Sorry about stupid Brexit. Regards, Bill separate-strings.co.uk

[@ŽeljkoHorvatić-l5o]

Can you make a cable for me and send it?

[@BaxBreakoutBox]

Hi, Where are you based?

[@kekostudioo]

Croatia, Hrvatska

[@ŽeljkoHorvatić-l5o]

Hrvatska, Croatia

[@BaxBreakoutBox]

@@ŽeljkoHorvatić-l5oHi, I cannot ship to the EU due to Brexit export rules. The cable is fairly easy to make and posted some instruction in an earlier message here. Thanks for asking, Bill separate-strings.co.uk