Got the Gumby last week. I didn't like the sound at first and preferred the Bimby (burned-in). After burn-in, the Gumby is clearly superior especially over balanced cable (solid copper Anticables).
Only one issue I had was an ear shattering blast due to a missed sample switch. I was using Jriver to stream my collection from a media server and upsample to 176.4 in integer mode. When Jriver is in exclusive mode, it changes your mac OS sound output from Schiit to something else like internal speaker. Jriver crashed and closed but continued holding onto the exclusive access to the Schiit. I wasn't able to change the system sound output back to the Schiit even though Jriver wasn't open. I opened Amarra for Tidal which gives direct access to the Schiit without going through CoreAudio system. This was a big mistake.
Seems like Amarra for Tidal tried sending through a 44.1 sample into the Schiit which was stuck on 176.4 from Jriver gaining exclusive access and crashing. What came from the output of my amp was the most unholy, horrid, digital noise I have ever heard. I don't think I've ever moved that fast to turn it off.
Beware... if your Gumby seems stuck in place, don't play around...
I experienced a similar volume blast one evening that left me with ringing in my left ear and a deficit between 4-8kHz on audiology exam. In my case I am pretty sure the extreme volume burst was music and not static. Earlier in the day there had been three episodes when the music suddenly shifted from the headphones to the computer speakers. I now understand that points to something gone awry in the USB signal path. These shifts occurred when the amp/dac was connected to two different Macs. I was listening to a well-regarded solid state amp/dac and the manufacturer has not been able to replicate the problem, nor have they suggested that the USB module might be implicated. There is no evidence of any power surge, or anomaly in my electrical circuits and it has never happened before in 40 years of listening.
I plan to purchase the Gumby/Mjolinir combo and want to do everything possible to keep this from happening again. One recommended solution is to use the toslink connection and avoid USB altogether. Both of my macs support 96/24 only, via optical output at the headphone jack. I have come from room speaker systems and am new to these variables, listening largely to CD's, Tidal hifi, and a few HD tracks. I don't know if the sampling rate differences will make a difference in my subjective SQ. I've thought the stellar quality of the HDTracks recordings of Amber Rubarth have come from the binaural recording and not the 192/24 sampling rate, but I'd be helped by other opinions.
What steps could I take to protect against USB instability if I wanted to try USB? Would adding a Wyrd to the G/M combo prevent these USB problems?
At the time of the events I was unsure if it was related to my sound source. I was logged into Tidal but was listening to a VLC playlist. The amp/dac I was using did not disable the Mac volume controls. I've used other Schiit products and understand from them that all their DAC's disable the Mac volume controls, but the controllers in applications like Tidal, VLC, and JRiver still work.
Is there a way to disable all the volume controls whether in the Mac or the application so that the Schiit is the only controller?
I've now come across four members with similar stories, without the persisting hearing deficit, and I wonder how many others there are. I'd like to find out if there are more members who have had these experiences. What forum would be the best place to start a thread for gathering that data, where the most people might come across it?
Thanks, McClelland