Using a IQaudio DigiAMP+?

[ElRay70K70H]

I'm looking replacing the guts of an old combo amp with a pi-Stomp.  Is the IQaudio DigiAMP+ code compatible with the IQaudio Codec Zero?

I know the physical arrangement will have to be different, but I'm going to have to do that anyway to fit into the combo amp chassis.

[Randall (Admin)]

Cool!  The IQAudio Codec Zero (which is the preferred card for pi-Stomp) is currently the only IQAudio card with an ADC for input.  The others from IQAudio are DAC only.  The only 3 cards I know of with ADC are the codec zero, the HifiBerry DAC+ADC and AudioInjector (all of theirs actually).  Those will all work with pi-Stomp.  The usage of the 2x20 GPIO matters, but fortunately all of those cards use the same pins. 

The Codec Zero does include a mono 1.2W amp which maybe works ok for very small speakers, but I might suggest running pi-stomp into a stand-alone amp module if you're driving a decent sized speaker.  So many cheap D-class modules available these days. 

[ElRay70K70H]

Thanks again!

... I might suggest running pi-stomp into a stand-alone amp module if you're driving a decent sized speaker. ...

I've been thinking of this project since I created the post.  The old combo amp I'd be transplanting this into is a old Crate Two-Tone. It has two independent guitar channels (with effects), so you can run two guitars into it, a CD input jack and two headphone jacks. The amp has some sentimental value (why I still have it), so the current plan is to re-create the functionality, but built around the piStomp.

At this point:

• Two mono inputs into the piStomp
• MIDI+Expression Add-On Kit
• A Bluetooth/Aux/USB Pre-amp
• A three-channel mixer
• As many buttons, pots, encoders, etc. that the piStomp can directly support
• 2x headphone amps
• 1x power amp
• Re-purposed car stereo speakers with "satellite" tweeters.


• Since there's cabsim plugins, I can output to a pseudo FRFR setyp

[Randall (Admin)]

Cool.  I'm happy to help with specifics when you get to those decisions.  Regarding control inputs, pi-Stomp offers 8 ADC and 5 debounce.  You can use some of the ADC ins if you need more footswitches, but you might need to do some minor code tweaks.  There are 3 undedicated GPIO's, 5 if you don't add serial MIDI (USB midi is always available without using up any GPIOs).  I assume you are planning to have an LCD, right?

[ElRay70K70H]

RE: Buttons, etc:
Right now, the plan is to have 2xTwo-Button foot switches, connected by TRS cables, one toggle on the panel. and then "something" with the other inputs.  I'll likely have at least on be an additional expression pedal input. The MIDI+Expression Add-On Kit will be included, so I'll have one.

... I assume you are planning to have an LCD, right?

Yup.