[AudioI] AudioInjector and Guitar
JONATHAN RIZZO
jr52884 at aim.com
Mon Feb 21 01:07:33 UTC 2022
Hi All,
I’m just curious, what are these guitar projects for? Is the Pi being used to record these signals?
The reason I ask is because I use Matt’s products for very low frequency radio signals.
Thanks
Jonathan
> On Feb 20, 2022, at 6:28 PM, Joseph DiVerdi via People <people at lists.audioinjector.net> wrote:
>
> Similarly, I can mention https://www.muzique.com/ which is a pretty broad and perhaps a bit cluttered assortment of the electronic side of electronic musical instruments (broadly defined). It is but one of a number of sites like it which vacillate between home-builders and buyers. Many are pretty old (both the site and the author). This analog stuff enjoyed a real lift-off (if that is the proper term) starting in the late 1960s with a heyday in the 1970s. j
>
>> On Sun, 20 Feb 2022 4:19 PM, hugh crawford wrote:
>> Forgot to mention this
>> https://www.guitarfetish.com/Neovin-Active-PreampEQ_c_147.html <https://www.guitarfetish.com/Neovin-Active-PreampEQ_c_147.html>
>> The guitarfetish site is sort of an uninformative mess, but Googling the products will turn up their old more descriptive web pages.
>> On Sun, Feb 20, 2022 at 2:59 PM Joseph DiVerdi <diverdi at xtrsystems.com <mailto:diverdi at xtrsystems.com>> wrote:
>> I have some of this kind of work on my website. Here is an example of an amplifier (and much more) I installed in a bass guitar including (relevant to this discussion) a pickup amplifier and final low impedance output buffer which is capable of driving looong cable lengths with high fidelity. The guitar details can be found at <http://xtrsystems.com/music/20201222%20bass%20guitar/20201222%20bass%20guitar.pdf <http://xtrsystems.com/music/20201222%20bass%20guitar/20201222%20bass%20guitar.pdf>> Other relevant items (including my planned installation of a Ultra audio-injector (another of Matt's fine products) and a raspberry-pi into a big amplifier and speaker system. One possibility for this is a Sonic-Pi application for synthesizer. Another is for looping. Big goals, limited time to work on them.
>> The guitar electronics were intentionally designed to operate on a single (9V) battery knowing full well there would be some power on/off transients (clicks). This was a prototype project (perhaps "throw away"). Two batteries would help or a negative rail DC generator. One of the helpful aspects is that the line voltage output is so high that I had to construct an in-line 10x attenuator that sits at the amplifier input (helping control line impedance and minimizing frequency roll-off, reducing line noise and the on/off transients).
>> I'm happy to discuss electronic circuit design in this context or others. I have been doing this stuff for many years and enjoy sharing the experiences.
>> Joseph
>> On Sun, 20 Feb 2022 3:42 PM, Matt Flax via People wrote:
>> > *** Caution: EXTERNAL Sender ***
>> >
>> > Do you know any circuits online of guitar preamps which are known good ?
>> >
>> > One idea is to design one up - possibly using the Pro soundcard first - because of its available power rails and low noise design and the AIABS inteface which would make it reusable.
>> >
>> > We could work through the design of a preamp there seems to be some interest.
>> >
>> > Matt
>> >
>> > On 21/2/22 09:37, hugh crawford wrote:
>> >> I was really excited to see this because I thought maybe somebody had figured it out. Imagine my disappointment to see that it was pointing back to me. I have not actually figured this out. I am dealing with six extremely low power output single coil pickups and the noise is six times worse than one would get from a regular setup so it’s sort of worst case scenario here.
>> >>
>> >> I am also building the actual guitar so I have been occupied with a multitude of other problems.
>> >>
>> >> Some ideas that I am considering but have not yet tried are to run the guitar signal through some sort of effects box, a booster for instance, that will do impedance matching and deliver a more useful signal to the audioinjector.
>> >>
>> >> In my case I’m thinking of trying six cheapish noise gates since hardly ever am I playing all six strings at once.
>> >>
>> >> Another idea involves using a high impedance Phono preamp as a buffer.
>> >>
>> >> My advice would be to build your device, then if necessary visit your friendly guitar store and try out different stomp boxes as buffers. That’s what I plan to do soon now that they are open to in person business.
>> >>
>> >> On Sun, Feb 20, 2022 at 1:46 PM Matt Flax via People <people at lists.audioinjector.net <mailto:people at lists.audioinjector.net>> wrote:
>> >>
>> >> Hi Harold,
>> >>
>> >>
>> >> Some people in the past have build guitar rigs, there is most likely good information here :
>> >>
>> >> https://lists.audioinjector.net/pipermail/people/2020-December/000157.html <https://lists.audioinjector.net/pipermail/people/2020-December/000157.html>
>> >>
>> >> http://forum.audioinjector.net/viewtopic.php@t=5797.html <http://forum.audioinjector.net/viewtopic.php@t=5797.html>
>> >>
>> >>
>> >> You can also contact those people directly if you don't get a response here.
>> >>
>> >>
>> >>
>> >> Matt
>> >>
>> >>
>> >> On 20/2/22 07:02, Harold Désert-Legendre via People wrote:
>> >>> Hello Audioinjector Users,
>> >>>
>> >>> I bought the audioinjector soundcard (stereo in/out via rca connectors) in order to build a guitar looper pedal. Will I need to adjust the guitar signal in term of gain? Or Can I directly plug the guitar into the soundcard (just physically transforming jack into rca).
>> >>>
>> >>> If anyone has experience with it, thanks for sharing your feedbacks!
>> >>>
>> >>> Regards,
>> >>>
>> >>> Harold
>> >>>
>> >> --
>> >> Checkout the community email list :
>> >> https://lists.audioinjector.net/mailman/listinfo/people <https://lists.audioinjector.net/mailman/listinfo/people>
>> >>
>> >>
>> >> --
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>> >> People at lists.audioinjector.net <mailto:People at lists.audioinjector.net>
>> >> https://lists.audioinjector.net/mailman/listinfo/people <https://lists.audioinjector.net/mailman/listinfo/people>
>> >>
>> > --
>> > Checkout the community email list :
>> > https://lists.audioinjector.net/mailman/listinfo/people <https://lists.audioinjector.net/mailman/listinfo/people>
>> >
>> >
>> >
>> -- Joseph A. DiVerdi, PhD, MBA
>> XTR Systems, LLC
>> ChemIntelligence for Hemp & Cannabis
>> +1.970.980.5868 - www.xtrsystems.com/ <http://www.xtrsystems.com/>
>> us02web.zoom.us/j/9460709393 <http://us02web.zoom.us/j/9460709393>
>
>
> --
> Joseph A. DiVerdi, PhD, MBA
> XTR Systems, LLC
> ChemIntelligence for Hemp & Cannabis
> +1.970.980.5868 - www.xtrsystems.com/
> us02web.zoom.us/j/9460709393
>
> --
> People mailing list
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