Ive got a dumb question to ask. I have one of the Digitech Trio Band Creators to mess about with on which the inputs are standard 1/4 inch TRS plug, fine for either my electric or my electro acoustic but I would like to use a non electric acoustic through a mic on this pedal as well, so how can I get from an XLR to a TRS? Are there reasonably priced DI boxes which would do the job or indeed any more expensive ones which would add other value as well? Advice much appreciated.
I got one too today, for Christmas. Can’t say I’ve had much luck with getting it to play backing that I like. The bass just doesn’t play any decent lines that aound right to me. The drums are a bit better but even then, it’s a bit of a struggle. Yes, I know you have to strip down what you tell the Trio what you want, in terms if playing it much simpler for the “Learn” part for it to know what to play back.
Not sure if a mic will work but you will need and XLR to balanced jack (TRS) cable to at least connect the two. Not sure if you will need to preamp the signal as an electric guitar’s signal is quite weak as well - and that works !
TRS does imply stereo, but the connector is inherrently unbalanced.
As the Trio doohickey is designed to accept an unbalanced high impedance signal, typically from a passive guitar pickup, why would you need a TRS plug at the other end of an XLR to 1/4" adapter lead?
I purchased just such an adapter lead years ago from Award Session to be able to connect a dynamic mic. (SM57 Beta) into a guitar amp's input (I know!). Fact is it worked OK.
If you place one of the two leads that constitute a balanced line carrying a balanced signal from an XLR onto the ring of a TRS, you will short that conductor to "ground" by inserting it into a TS socket as mitchfit has already noted.
What you are trying to do is unbalance a balanced connection and that is easy to do provided you wire it correctly. You cannot go from unbalanced to balanced without using additional component(s) such as (eg) a "balun", and strictly speaking the device should then be configured to be looking into a differential input, but that's another subject which I would have to Google!
Edit: ...and stick to dynamic mics that don't require phantom power!
Just for the record...i am showing my age here...but TRS actually stands for Tip Ring and Sleeve...originated as Telco plugs and jacks from Ma Bell (payor of my small but blessed pension) used originally on telephone switchboards around the time that WC Handy was learning the blues...
And every permutation of line to mic high to low impedance and pads in everything from 1/8" to xlr... As well as shure TA3 and TA5.
Never knowing what kind of feed I might get or what I might have to send a signal to it was essential kit. For your use A simple adaptor might run 10£ and barrel transformers 35£ and up. A used whirlwind DI box probably can be had for 75£ up...
I'd try the above adaptor alone as many consumer devices will work with mismatched IO setups like the one described. And A low to high impedance transformer if needed... Should be available mail order from any audio supplier or electronic supply house if your lucky enough to have one nearby. The 3 in my hometown are history as of 5 or so years ago.
Edit: as Steve mentioned above, you can use a mono 1/4 inch plug in a TRS jack. It won't hurt or break anything to try and will work fine most in most cases.
Caveat with high impedance lines : shorter the better, no longer than 15'
One other thing not mentioned is possibly using a high impedance mic. There are some nice vintage shures like the venerable model 55
Also, I was assuming that the OP just wanted to buy a an adapter or a lead, but it's child's play to wire a TS (mono) plug to A 3 pin XLR. Pin 2 on the XLR goes to the tip on the TS plug, and pins 1 and 3 are shorted to the sleeve on the TS plug. Voila! you have unbalanced your mic and it'll work just fine. If you encounter an impedance mis-match, a little LM700 series transistor radio output transformer costs pennies and will sort it. Line level matching would not be achieved in this way, but for a dynamic mic in the OP's set up, that should not be a problem anyway.