A magnificent little pedal, perfect for me.
I've tried many harmony gadgets, Most of them just an echoey mush of irritating noise, with unusable added effects,
Then the H1 from year 2011, simply, nicely, just a harmony voice or 2 with an on/off foot switch, plus a couple of easy controlls.
No need to select a key for my harmonys, the guitar plugged "through" the H1 pedal controlls the harmony key in an automatically and perfectly easy usable way..
No weaknesses, no problems at all for me.
I have problems with human harmony singers, they tend to harmonise when not needed, or not sing when needed, but the H1 only sings when the foot switch button is pressed, when I press it.
There is a mic volume control which must be adjusted to light the green signal Led for the harmonys to operate correctly, but very simple to understand.
I'd like the phantom power to be 48/52 volts, as condenser Mics sound way better at 48/52 volts, Tha H1's phantom voltage is 24, works OK, but..
The latest TC helicon version of this pedal has a strange problem and is full of fx that my mixer already is gifted with.
Over all, a superb machine, perfect for me in every way, works perfect with my older sound equip.
A very good alternative to this H1 pedal is the Boss acoustic singer pro/live, from 2022, with very good harmonies built into them.
Thomann gives us performers all this equip at very good prices. Nice 👍