[AudioI] AudioInjector and Guitar

[hugh crawford]

Forgot to mention this
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>
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>
> 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> 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
> >>
> >>     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
> >>
> >>
> >>     --
> >>     People mailing list
> >>     People at lists.audioinjector.net
> >>     https://lists.audioinjector.net/mailman/listinfo/people
> >>
> > --
> > Checkout the community email list :
> > 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/
> us02web.zoom.us/j/9460709393
>
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