I wanted a way to quickly and cheaply (free) test how my DAC worked with DSD music. Unfortunately, a lot of music apps don't actually send DSD to the DAC, defeating the whole purpose.This app works perfectly for testing DSD files. My DAC confirmed it was receiving them as actual DSD; you think all dedicated apps would do this, but no.Also, the app initially wouldn't open files with the extension .dff, only those with the newer .dsf extension. However, by changing the extension manually, the app would then open and play them. I decided to email the developer about this inconvenience. Within 24 hours, he not only responded, but uploaded an update of the app to the App Store that would accept the .dff extension! Super impressive! Now I am going to try the paid full app because it is priced right, doesn't need a subscription, and, unlike some app, will treat DSD files properly.

Subscribed on this app since its inception, Although i have iTunes. Tidal, Audirvana, Izotope Ozone 9 and etc. Colibri has since been my go to player for its simplistic and minimalist concept and design, because some players can get to technical and at the end of the day u just want open an app then hit play and works without issues everytime. if your in the market a very simple yet powerful music player? i highly recommend Colibri apps.

The fact that Gabor went as far as to create a simple diagnostic tool to both test our own setups and demonstrate the capabilities of his music playback software speaks volumes to the integrity he has for his product and music listening tech in general. Thank you for your efforts!

Does exactly what's required to test a DAC for compatability with DSD. Simple, straightforward, and convenient.