Ive been checking the phone and computer shops for these things ,
its mainly generic China interfaces , 5-10 euros
I found the Apple USB C headset adapter for around 15 euros ,
It gets a good review over in ASR and stands up well to DACs many times its pricetag ,
it puts out a volt into 30 ohms
Very good distortion figures , noise around -113db , upto 48khz/24bit ,
Works with Windows .
I was going to try and make a pair of balanced outputs from two dongles
instead of feeding the dongle the usual L,R signal arrange for the DAW to send a mono signal with +/- phase to each pair of outputs ,
ok it doesnt drive full studio level , maybe just a passive attenuator box followed by a power
amp/active monitor or variable line input .
On the subject of USB power , a single cell lipo USB power bank needs a dc-dc convertor , that makes way more noise than the battery itself ,
I recently tested a DC-DC switcher I got off Ebay , around -44dbu on the Fluke with the output unloaded.
Nicad cells measure the lowest in terms of noise,
Some where around -200db off load
4x1.2v =4.8v its a good number , its within the spec for USB 5v, no switching means no added noise, no regulation is required and nicads can handle amps of current and not even break a sweat ,
it would require charge management a USB C hub and a box with a couple of XLR's on it
https://www.audiosciencereview.com/...pple-vs-google-usb-c-headphone-adapters.5541/
its mainly generic China interfaces , 5-10 euros
I found the Apple USB C headset adapter for around 15 euros ,
It gets a good review over in ASR and stands up well to DACs many times its pricetag ,
it puts out a volt into 30 ohms
Very good distortion figures , noise around -113db , upto 48khz/24bit ,
Works with Windows .
I was going to try and make a pair of balanced outputs from two dongles
instead of feeding the dongle the usual L,R signal arrange for the DAW to send a mono signal with +/- phase to each pair of outputs ,
ok it doesnt drive full studio level , maybe just a passive attenuator box followed by a power
amp/active monitor or variable line input .
On the subject of USB power , a single cell lipo USB power bank needs a dc-dc convertor , that makes way more noise than the battery itself ,
I recently tested a DC-DC switcher I got off Ebay , around -44dbu on the Fluke with the output unloaded.
Nicad cells measure the lowest in terms of noise,
Some where around -200db off load
4x1.2v =4.8v its a good number , its within the spec for USB 5v, no switching means no added noise, no regulation is required and nicads can handle amps of current and not even break a sweat ,
it would require charge management a USB C hub and a box with a couple of XLR's on it
https://www.audiosciencereview.com/...pple-vs-google-usb-c-headphone-adapters.5541/
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