chungmc
New Head-Fier
Hey Conrad, I tried putting the iPhone at full volume, and you’re right: the faint hum on Airplay (which is only noticeable with Mojo also at higher volume) goes away!!While I'm not disagreeing with what you're saying (raising iPhone volume allows lowering of Mojo volume which reduces background hum), I get a noticeable click and silence between the last but one volume indicator and the last one (full volume). I can flick the volume up and down between those two and the hum directly correlates with the full, not full state. It's not a gradual decline at all, it's an on/off situation.
I wonder if what you're describing is to do with the electrical interference being picked up by the Mojo? I'll have a listen for that.
I did think about the bit perfect mode as well, I know that if you're playing DSD files and you drop the volume of the source then it's not bit perfect anymore. Once you apply any change in the digital domain it can't be. Given that setting the volume to full on the iPhone removes any change, I'm assuming that something similar is happening.
I think most of these quirks and anomalies aren't really the Poly at all. I get interference when using hotspot mode on the train, but I assume that's other devices trying to connect to me. I'm hoping that the ability to hide Poly's SSID is added to future versions. My connection dropped out earlier today while walking, but it's because my phone switched connection to a BTWifi zone. It certainly seems like the oddities, interference, and strange behaviours appear more in places that are busier and have more wifi and, I presume, bluetooth activity. It doesn't behave in this way when I'm sat in my garden, for example.
This is good news. Even though Airplay will still cap bitrate to 44.1k, the SQ is still pretty darn sweet.