Hello James,
Is there any audio and noise quality difference between powering from 9V DC and 5V DC USB? Dynamic range, S/N ratio, headroom are all identical? I am planning to power it from a MIDI USB host. Will there be any noise interference? I will probably use this one: http://www.hobbytronics.co.uk/usb-midi-converter
Thanks
Power supply audio quality
Re: Power supply audio quality
If the USB power is "good" the audio quality will be the same.
Often, connecting to a computer USB can cause ground loops and you get a significant increase in noise. Using a USB isolator (I use this one, for example, https://www.olimex.com/Products/USB-Modules/USB-ISO/) breaks ground loops and ensures the audio is not affected.
Powering from a standalone USB supply (phone charger, etc) can work well too. But it depends on the charger -- Apple ones work well.
I haven't tried the Hobby Tronics converter, but I assume it will be ok -- it's powered from a standalone 5V PSU, so there shouldn't be any problems with noise/ground loops. I have used a similar product from Kenton and that works just fine when it powers the Wahoo.
Often, connecting to a computer USB can cause ground loops and you get a significant increase in noise. Using a USB isolator (I use this one, for example, https://www.olimex.com/Products/USB-Modules/USB-ISO/) breaks ground loops and ensures the audio is not affected.
Powering from a standalone USB supply (phone charger, etc) can work well too. But it depends on the charger -- Apple ones work well.
I haven't tried the Hobby Tronics converter, but I assume it will be ok -- it's powered from a standalone 5V PSU, so there shouldn't be any problems with noise/ground loops. I have used a similar product from Kenton and that works just fine when it powers the Wahoo.