Aspiro has published its latest year-end financial report for 2012, revealing Q4 net sales down 5.4% year-on-year to SEK 67.8m ($10.7m).

However, they include a deeper dive into the performance of its music division’s WiMP streaming service. Aspiro generated SEK 48.4m ($7.6m) in Q4, up 9.3% year-on-year.

However, the division’s earnings before interest, taxes, depreciation and amortization (EBITDA) dropped from a loss of SEK 8.4m ($1.3m) in Q4 2011 to SEK 21.2m ($3.3m) in Q4 2012. And while those music revenues were up year-on-year, they were less than in Q1 (SEK 49.3m), Q2 (49.7m) and Q3 (50.8m). Aspiro says the drop was due to “a one-off timing adjustment” though.

Aspiro ended 2012 with 370k paying users of WiMP. The company is testing free versions of the service with partners in Sweden and Denmark, while also launching the paid service in Poland.

Alongside the results comes an announcement from Aspiro that it’s bumping up the audio quality for WiMP: now offering ‘standard’ AAC+ 64 audio and ‘high quality’ AAC 320 audio, with a beta test of lossless streaming to specific devices about to kick off.