Here's some data on my Touch with Soundcheck's Touch Toolbox 3.0 (http://soundcheck-audio.blogspot.ca/...oolbox-30.html) software mod applied.
Before I start, I just want to say that over the years I have not been
involved in any of the discussions around this mod or the merits of it.
Even though I do not necessarily agree with many of Soundcheck's
comments on his site, I do appreciate his work in putting it together
and creating the install script which was easy to run; it's always good to
have hobbyists experimenting with stuff and it's interesting to see the
feedback from users.
I followed his instructions to turn off the plug-ins, change to
server-side decoding of FLAC in the "File Types" tab, "No Volume
Adjustment", etc... As per instructions, WinSCP used to transfer the
script and PuTTY for logging into the Touch.
I downloaded the script with 'wireless LAN deactivated' but noticed in
the status screen that WiFi was labeled as "enabled" still (not sure if
this means it's on or off!), so I used the 'tt -w' to turn off (or on)
the WiFi status for good measure during a few of the measurements.
Here's the screenshot of the "status" output for the "NoWiFi" condition
in my charts (in retrospect, I think the modification turned off the
WiFi, so when I 'disabled' the modification, it means I must have turned
it on... not that it makes any difference as results show):
I also wanted to test the analogue output with "tt -o 1" but I could not
get analogue output to work even though the status screen said it was
enable. If anything, one would expect that turning off the screen, no
wifi, server side decoding may drop the analogue noise floor maybe a few
dB's... Oh well, I guess anyone who would go through this amount of
modding would not be using the internal DAC anyways.
Procedure same as tests in previous posts, here's the result from the
Touch+TT3 --> ASUS Essence 1 --> XLR cable --> E-Mu 0404USB:
16/44 THD graph:
24/96 THD graph:
The first column of each table is the stock Touch using the coaxial output (proper shielded coaxial cable of course).
I see no difference with the Touch as digital transport despite screen
off, no WiFi, server side decoding on these objective measurements.
Subjectively, likewise, the Touch sounds great played through the
Essence 1... Loving the sound of some Depeche Mode as I'm typing here
with the mod still installed. I can see how not having the screen on and
the ability to "touch the Touch" to make track selections would annoy
me after awhile :-).
At least in my case with this specific DAC, the Touch Toolbox 3.0 mod
made no difference to measurements even down to below -110dB noise