Saturday, 25 February 2017
MEASUREMENTS: A look & listen to Roon Bridge - Raspberry Pi 3 Streaming (HiFiBerry DAC+ Pro & USB DAC)
Last time, I talked about Roon and discussed my experience with it using the NUC as the primary installation and playback. No doubt, you are aware that many people will use inexpensive devices like the Raspberry Pi 3 to handle playback distributed around one's home... And no doubt you've also come across much hyping about more expensive, low power devices when for around $100 and a little know-how, you can get it done quickly, easily and sounding great.
First, I just wanted to practically lay out a simple way to install Roon Bridge on the Pi 3 that worked for me and using which I will run a few tests to demonstrate the sonic output. Remember that the network protocol from the Roon "Core" (my Windows computer) to the Roon "Bridge" (Pi 3) is what's called RAAT (Roon Advanced Audio Transport). It's a protocol with a number of benefits as highlighted in the link.
Saturday, 18 February 2017
NOTE: I know that just a couple weeks ago, version 1.3 of Roon has been released and I'll perhaps look into that a bit later once some of the initial bugs are stamped out and the system matures a little. Clearly 1.3 has a few new interesting features but the basic bit-perfect playback function I trust would be the same which is what I'm aiming at exploring in this article.
Over the last few years, I have already gradually made my way across the different audio ecosystems that most audiophiles find themselves interested in. Starting with the venerable Squeezebox / Logitech Music Server system (eg. Touch, Transporter), to standard Windows PC and Mac OS X playback, to questionable software (like JPLAY and the JPLAY update), to even just as questionable OS tweaks (eg. Fidelizer), to more recently looking at DLNA streaming using low power devices like the Raspberry Pi 3 and ODROID-C2.
For today and the next few weeks (let's see how this goes), let's spend some time on Roon, another computer audio system much lauded in the audiophile press and see if we can make a few measurements and comment on some observations and thoughts...
Saturday, 11 February 2017
MUSINGS: Discussion on the MQA filter (and filters in general)... [Update: Including a look at the classic "Apodizing" filter.]
Here's an interesting comment from the post last week...
As I said... Dammit CBee! Now you've made me post another blog entry on MQA :-).
Saturday, 4 February 2017
I don't have an MQA-capable DAC myself (and honestly owning one is not high on my list of priorities), but a friend does happen to have the Mytek Brooklyn which is fully MQA-native and has the ability to decode all the way to 24/384. Furthermore, he has the use of a professional ADC of fantastic quality - the RME Fireface to make some recordings of the output from the DAC.
|Image from Mytek. Obviously very capable DAC!|
1. Can we show that hardware-decoded MQA is closer to an original signal beyond the 88/96kHz decoding already done in software?
2. Can we compare the hardware decoder with the output from the software decoder? How much difference is there between the two?