I don't have an iPhone and haven't experienced any problems on a Windows laptop with any 'horrible noises', but now upon testing on Android, it performs poorly (sounds muffled, metallic interference sounds, some vinyl-like clicks, compressed sounding with FLAC). My comments above also list an audible noise floor and bass light tuning (we are in agreement).
I think, in spite of the limitations of the Feather DAC, the value for money equation remains unchanged at the price I paid. I got the DAC and a pair of bass boosted headphones that complement it for $35 from Cyberdrive. There aren't really any competitors in that space that play 16/44.1 to DSD256. Time will tell on the engineering of the upcoming units, but the Feather DAC is pretty good for what it is.
Let me see if I understand this......
You have a Feather DAC from Cyberdrive.
You attach it to your Laptop and have no issues whatsoever.
You attach it to an Android device and it is beyond horrible.
You come to the conclusion the Feather DAC is to blame.....this defies any logic. Sorry.
Cheers.
This doesn't defy logic, and the response to my comments presents no logical train of argument. The presumptive logical argument forgets that Windows compatibility is not equivalent to universal compatibility. Whether the poor compatibility with iPhone and Android is the fault of the phone or the DAC implementation is irrelevant, what is important is that the DAC has two observers (small sample size caveat) who have had sound issues when trying to use the DAC with phones running the two most popular platforms. I'm running a Note 2 with Android 4.4.2, maybe it will work better on Android 5 or 6 or other devices, but I don't have the device to know. I think Originalsnuffy probably has it right, when used with Android or iPhone there is no driver and a lack of buffer. The DAC wasn't recognized in USB Audio Player Pro (no DAC attached error), I used Neutron Pro (which plays perfectly with my Geek Out 1000 and Geek Out V2). It may be the case that other users don't have these problems, but this could present another potential problem: quality control. Either way, it is worth having observations from people who have the device. If you'd like to confirm observations, you can go buy the DAC. The bundle I bought was 50% off and $15 for shipping to the UK, so it was actually $40 in total (my memory was $5 off) with headphones (mid-fi at best but complementary to the DAC). You can get the bundle for $50, or just the DAC for $40, neither including shipping.
There is a Windows driver for the DAC (and it is important to have the right driver, Aura DAC driver will play, but not well) which allows the DAC to use an adjustable buffer on the PC side. Macs have excellent DAC compatibility, so I expect that this would work fine on Macs, too. My value judgement was based on how I would use it, as a cheap on the go DAC. I don't need this device to work with my phone. I'm getting the Seiun Pro X and an Echobox Explorer, I'll have something to work well as a portable DAP, and I have enough space to carry it around. I paid next to nothing for this because I got it on a Black Friday deal and it is excellent value for what I paid. Individual value judgments will vary.