Sharing some thoughts and observations about some time I spent comparing the mt220 via different players and settings.
Please take all this with a pinch of salt. It may simply be a placebo effect. Was also difficult to match sound levels, so that too could distort perception.
* Players used: Foobar, AIMP, Audacity (really a recording open source software)
* Yamaha Steinberg ASIO (for the THR5A), WASAPI (Event and where the option allowed Windows default), Direct Sound.
* Tried different sampling rates 44.1k to 192k and different bit depths upto 32bit.
* Routed via the on onboard Realted HD soundcard or the Yamaha THR5A
* The players were set to no DSPs and all gain related settings turned off
(Foobar has gain applied as default, I think, which may contribute to it being seen as giving better sound - higher spl adding to a feeling of improved sound).
Brief unsure conclusions:
* Felt almost no difference between Foobar and AIMP on WASAPI Event settings. At times, AIMP on WASAPI windows default seemed a bit poorer.
* Via the Yamaha THR5A on WASAPI was pretty much the same.
* Surprisingly, little or no effect felt at higher sampling rates and bit rates higher than 24bit (Onboard soundcard allows up to 196k sampling)
Now the interesting part:
* Initially felt unsure but after hearing multiple times the things did seem
noticeably better THR5A on its Steinberg ASIO.
* While there was no real noticeable difference between AIMP and Foobar to my ears,
Audacity made things better. Often felt significantly better(onboard soundcard). This was without the ASIO (Audacity does not given an option for ASIO).
* The improvement in both cases was in the resolution and imaging of sound. The sound had more body, felt less thin. The Midrange improved a little bit too (felt so more with Audacity). Very slightly more airy with possibly better transitions.
Folks might want to try out Audacity, not as a player (not really viable), but simply to see if they can get better sound from their system. Need not get into understanding the software. Simply drag and drop the file onto it, and play.
I am a bit surprised at the improvement felt via Audacity.
Installable version: http://www.softpedia.com/get/Multimedia/Audio/Audio-Editors-Recorders/Audacity.shtml
Portable version: http://www.softpedia.com/get/PORTABLE-SOFTWARE/Multimedia/Audio/Windows-Portable-Applications-Audacity-Portable.shtml