We don't want the DAC's ground move around at 100Vac worst case, with an rectified AC waveform of the stray current - lots of harmonics. (And in those cases iOS will just up-sample to 48K during playback even though 44.1K is selected). Thats Apple for ya, maybe the AD on the connector on the headset is capable of 44.1K/48K while the DA is only 48K. And even while in normal use the voice coils are shorted out by the low amp output impedance (no stray current through the phones) I still think it is a good idea in general to nail down the DAC's ground, this also removes the tickling feeling you have when you touch any metal parts of the DAC. Is really strange that with headphone with mic you can change sample rate and without mic you can not. Giving the power supply secondary voltage a fixed reference by earth-grounding the RME removes or greatly reduces the amount of capacitive stray current. So, it's there, though practically irrelevant in my case. At a glance you can see the type and bit and sample rate of the music source and the output bit and sample rate to the DAC. However, to avoid any unwanted resampling by Audirvana's playback engine, you need to make sure that the streamer's correct supported maximum PCM resolution bit depth & sample rate is set correctly in the Audio System tab - that would be 24 bits and 96kHz for the Chromecast Audio. I just double checked with my HD700, I can hear a just audible faint 100Hz hum/buzz when the RME is in standby. My 3. This is the effect of capacitive stray current flowing through the voice coils, from power supply back to earth, through the air (!) - the capacitive coupling to "world". Audirvana Studio adds the ability to create playlists that combine ripped CDs as well as Qobuz/Tidal streams. UPDATE: To find the sample rate of the album and play it correctly you have to play a track, click the info button to reveal the sample rate, change Audio MIDI to correct sample rate, restart Apple Music, play the track again. => High chances you will get audible hum in standby. Thus, you have no idea at what sample rate to set Audio Midi. Mains supply is in the high range, 230V Phones are medium to high impedance and sensitivity When you start playback, it simply switches the sampling rate to whatever you’ve configured (upsampling, etc). Only used with headphones, to remain fully floating Basically we must set Audirvana to down sample everything to 48kHz sampling rate and disable. DAC is fully floating, typical use case would be using the optical input, or USB via a USB galvanic isolator We will also have an iPhone/iPad app and an Android app. Pano Administrator Joined 2004 5:10 am 3 Could well be Windoze resampling it. Click to expand.Yes, and this will be the case for many other users as well. Actually, not all devices have automatic sample rate switching (or not all driver modes supports it) so, you might need to set the device sample rate manually (or try other drivers as like ASIO ) then (where from you set it depends on your OS).
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