Is WIRELESS GK3 PICKUP possible?

Started by Don Juan de Marco, August 04, 2010, 11:33:51 PM

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Kenmac

Quote from: sixeight on April 26, 2016, 10:47:10 AM
We have discussed this already here: https://www.vguitarforums.com/smf/index.php?topic=13696.0

But so far there is no info on this project. No info how to order of build one.
I only posted the one video which hadn't been seen up until now. admsustainiac added the second one with the sea foam green strat which I've seen before in the thread you linked to. Sorry, but I didn't realize it was the same person.  :(
"Let them brush your rock and roll hair."

admin

#101
QuoteI only posted the one video which hadn't been seen up until now. admsustainiac added the second one with the sea foam green strat which I've seen before in the thread you linked to. Sorry, but I didn't realize it was the same person

Sorry -

Just doing house keeping / organizing / merging - to keep the relevant info in one thread

Rocky Wireless GK page, with a few pictures.
http://www.kapela-gibon.cz/roland-gr55-wireless-system/#



sixeight

#102
QuoteBut so far there is no info on this project. No info how to order of build one.
...but looking at some of the comments in the original video, it looks like this receiver will go into production.

Quote+kulu hara. Currently working on a version that will work with existing or integrated sensors (for example fender ready Roland) System will be on two AA batteries, lasts 8 to 10 hours. Availability next month, soon you will enjoy video and new photos... 

The website does not state this in the English part yet, and I do not read Czech.
http://www.kapela-gibon.cz/roland-gr55-wireless-system/

gumtown

#103
Here is his Wireless page, with a few pictures.
http://www.kapela-gibon.cz/roland-gr55-wireless-system/#!


Still no specifications on that, except it only does the 6 strings of the hex pickup, and requires a separate normal pickup transmitter.
The only other bit of info I have managed to find is that the range is 10~20 feet..

For my design, it does all GK signals, 6 hex channels, 1 normal P.U, S1/S2, GK-Volume, and GK-type (required by the GP-10 for auto GK sensing).
I am optimistically shooting for a range of 1000 metres (user selectable power levels), and 75+ selectable channels over 4 frequency bands.
Transmitter rechargeable with a regular (universal) micro USB phone charger, and it will probably be used on the receiver too, as the internal 7 volt supplies reliability between different Roland units seems a bit variable.
It will be a typical external belt pack, not sure about an internal kit due to the space required.

I am currently waiting on SMD component stock and tools to arrive, R.F. side of things is quite fiddly, making hand etched prototype printed circuit boards.
Very time consuming..
I also ordered a pair of these funky looking watch repair type glasses, my eyes are not like they used to be..
Free "GR-55 FloorBoard" editor software from https://sourceforge.net/projects/grfloorboard/

drbill

Sweet! Belt pack definitely a better choice, imho. Do you have even a guess as to how much you will need to price these to make it worth your time? Your software has always been free, which never seemed fair to you.
GP-10, KPA
BM i2.13p, '76 Les Paul Deluxe w/GK-3, MiM RRS, Ibanez RG420GK, Charvel strat copy w/GK-2a, FTP

CodeSmart

Dear Colin,
I'll be in NZ mid December and January. Most probably for the only time in my life.
Really would like to meet you for an hour and see this magic :D
But I got more gear than I need...and I like it!

gumtown

Quote from: CodeSmart on April 26, 2016, 02:58:22 PM
Dear Colin,
I'll be in NZ mid December and January. Most probably for the only time in my life.
Really would like to meet you for an hour and see this magic :D
We shall make sure that happens  :)
Free "GR-55 FloorBoard" editor software from https://sourceforge.net/projects/grfloorboard/

mbenigni


Kenmac

Quote from: admsustainiac on April 26, 2016, 12:42:52 PM
Sorry -

Just doing house keeping / organizing / merging - to keep the relevant info in one thread

Rocky Wireless GK page, with a few pictures.
http://www.kapela-gibon.cz/roland-gr55-wireless-system/#





























Not a problem. Organization is a good thing.  :)
"Let them brush your rock and roll hair."

kiwimighty

#109

Quote
For my design, it does all GK signals, 6 hex channels, 1 normal P.U, S1/S2, GK-Volume, and GK-type (required by the GP-10 for auto GK sensing).
I am optimistically shooting for a range of 1000 metres (user selectable power levels), and 75+ selectable channels over 4 frequency bands.
Transmitter rechargeable with a regular (universal) micro USB phone charger, and it will probably be used on the receiver too, as the internal 7 volt supplies reliability between different Roland units seems a bit variable.
It will be a typical external belt pack, not sure about an internal kit due to the space required.

I am currently waiting on SMD component stock and tools to arrive, R.F. side of things is quite fiddly, making hand etched prototype printed circuit boards.
Very time consuming..
I also ordered a pair of these funky looking watch repair type glasses, my eyes are not like they used to be..


Take My money now  !!!! cant wait to see what you come up with.. Chur Bro.

viramundo

Quote from: gumtown on April 26, 2016, 01:20:17 PM
Here is his Wireless page, with a few pictures.
http://www.kapela-gibon.cz/roland-gr55-wireless-system/#!


For my design, it does all GK signals, 6 hex channels, 1 normal P.U, S1/S2, GK-Volume, and GK-type (required by the GP-10 for auto GK sensing).
I am optimistically shooting for a range of 1000 metres (user selectable power levels), and 75+ selectable channels over 4 frequency bands.
Transmitter rechargeable with a regular (universal) micro USB phone charger, and it will probably be used on the receiver too, as the internal 7 volt supplies reliability between different Roland units seems a bit variable.
It will be a typical external belt pack, not sure about an internal kit due to the space required.

I am currently waiting on SMD component stock and tools to arrive, R.F. side of things is quite fiddly, making hand etched prototype printed circuit boards.
Very time consuming..


Sounds amazing, when it gets done I want one, much more suitable for my purposes than the Czech guys design.


Elantric


Smash

Really? I know you're well connected in the industry so respect that but if this is right money for hex only, no mag and no control what is right money for Gumtowns full GK spec?

Elantric

#114
Anything he wants to charge and have enough margin ( profit) to make the exercise of going into production worthwhile

But I hate to bring it up but due to wide ranging variance of regional  enforcement of FCC /CE global RF emissions compliance regulations , a wireless GK product line invites undesired government attention with possible costly intervention and monetary loss. 
https://www.vguitarforums.com/smf/index.php?topic=11234.0

Smash

Fair comment - and "Argh!!" re: link - nothing is ever easy...

viramundo

When answering my question about latency Rocky responded. 'Hey, the delay is 0.5 ms, the device transmits only six strings, the guitar is the main transmitting the smaller box (can be used separately), and both signals are received in that larger box.'

I don't know if that's a lot or not tbh but given the already quite large latency & tracking issues with the GR55 (IMO) maybe I'd be loathe to increase it further.

Elantric

#117
Quote'Hey, the [wireless transmision] delay is 0.5 ms,

about the same as FTP and Panda MIDI Beam
https://www.vguitarforums.com/smf/index.php?topic=9878.msg70879#msg70879
Andras Szalay wrote>
QuoteWireless Latency: 0.38 milliseconds

gumtown

Still working relentlessly on this concept, while waiting on arrival of some more materials to build the up/down R.F. converters & front end (looking to cover the 520~960Mhz range in 1Mhz steps (about 400 channels selectable) at this stage to cover the new 'legal' wireless mic radio bands), I have been covering other design concepts too.
Below are two concepts which I have been experimenting with.

Full Digital design - after some testing using 2Mbps 2.4 Ghz radio modules, to squeeze all that data down a narrow pipe line, would end up with less than 12bit audio, so to do 7 or 8 channels of 24 bit audio and GK data will require 8 Mbps throughput, so complicated R.F. modulation techniques are required (OFDM), as used in WiFi modules, so I am looking at the 5.8Ghz band for this, and in the near future, there are some crazy 60Ghz WiFi chips on the way.
I have the basic chip programming sorted for A/D D/A packet handling and data transmission, but with the current CPU chip, using C language is too slow, and requires programming in assembly language for a 20x speed update to minimise latency.
I had the 2Mbps wireless GK concept working with 7 channels 8bit audio at a low sampling rate, the sound was truly terrible, definitely needs to be 20~24 bit @ 44.1~48Khz rate, but the concept and transport does work.

Low Tech Analog - Currently building a simple low cost design using double side band modulation  for 'Group' wideband stacking of the audio (reliable method from analog days of old - Frequency Division Multiplexing - FDM), which will utilise a regular analog video input/output, so an ordinary wireless video sender/receiver can be used, there are very miniature low cost modules available for the 2.4Ghz and 5.8Ghz bands available, such as those used in drone video transmission systems.

but back to the build..
Once I get the 'proof of concept' build finished and working 95%, which are a collection of various strip boards, modules, and hand etched boards, I can then get a few professionally etched prototype circuit boards to assemble. The Wireless GK will be quite configurable as most of the selected chips used in the Transmitter and Receiver are very programmable with options.
Free "GR-55 FloorBoard" editor software from https://sourceforge.net/projects/grfloorboard/

whippinpost91850


gumtown

Starting to get somewhere again, successfully have an R.F local oscillator software programmable from 140Mhz to up over 1.1Ghz with a steady and consistant output.
A bit painful having to build your own chip interface software libraries.
Successfully soldered a few QFN20 chip packages to a board too, my first attempt at installing SMD chips.

So I am still working on 3 different technologies in 3 different wireless projects, some initial designs have failed due to flawed concept,
but I am able to take that in stride and keep pushing forward, and build up the pile of rejected prototype boards..

There are some very high tech chips and modules out there, but very difficult for those suppliers to share any information on the product.
Free "GR-55 FloorBoard" editor software from https://sourceforge.net/projects/grfloorboard/

RogerVG8EX

Gumtown, I haven't tried it yet, I am currently working with 24 pin synths and in a few weeks I'm going to start a 13 to 24 pin converter project. The next project is the substitution of a 13 pin output jack with a DB15 and after that I can try the wireless guitar synth.

Elantric

Quotein a few weeks I'm going to start a 13 to 24 pin converter project.
https://www.vguitarforums.com/smf/index.php?topic=11980.0

gumtown

On the other hand..
the digital version of the project I have settled on using 4 x PCM1803 for A/D conversion and PCM1770 for D/A conversion.
Been looking at packetizing the data and seem to have come up with something so similar to ADAT format, that I might as well do it as ADAT format.
8ch x 24bit 48kHz NRZI encoding in a 256bit packet with reserved proprietary bits (for the GK controls).
the Raw digital audio would be at a rate just over 12Mbps, with NRZI encoding, it would be around 6Mbps.
This leaves a spare audio channel for either a second guitar in/out or a headset microphone.
If I put an optical I/O in the project, it could double as an 8 track ADAT interface for recording from the guitar, or ADAT playback into the receiver unit.
It may also be possible to utilise the system also as a wireless ADAT interface.
Have some WiFi modules on order capable of up to 72Mbps data rate.
Free "GR-55 FloorBoard" editor software from https://sourceforge.net/projects/grfloorboard/

Smash