FLAC decoder testbench
To further the use and development of FLAC, a testbench containing files with different parameters was constructed. The testbench consists of 46 files, each one having a different combination of characteristics (like samplerate, bitdepth and number of channels) and FLAC features (like blocksize, maximum partition order, maximum predictor order, maximum predictor precision etc.) However, all combinations fall within the so called subset: a limited set of FLAC parameters that fit in the frame header and are supposed to be 'streamable'. Please be aware that certain tested features (such as blocksize 16 or a samplerate of 38457Hz) are pretty much useless in day-to-day usage, and that failure to properly decode such a file is mostly of interest to developers than to users.
For more information on which file tests what characteristics and features, please refer to the readme.txt file that is included in the testbench. All files are licensed under a Creative Commons license, but please refer to the readme.txt file to see which file is licensed under which Creative Commons license and for 'attribution' as to who is the original author.
The testbench can be downloaded here
| CDDA (44.1kHz/16-bit and less) | High-res (96kHz/24-bit and more) | Multichannel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Decoder | Blocksize | Features | Samplerates | Bitdepths | Variable blocksize | General | Blocksize | Features | Samplerates | Bitdepths | Channel lay-outs | Features | Remarks |
| Files in test set | 1-10 | 11-18 | 19-21 | 22-23 | 24-27 | 28 | 29-30 | 31-32, 34 | 33-36 | 37 | 38-43 | 44-46 | |
| JVC KD-R871BT | Limited | OK | Limited | OK | NOK | OK | Freezes | - | NOK | - | NOK | Heavy stutter with blocksize 16. Stretches non-standard samplerates. Samplerates above 96kHz, variable blocksize files and multichannel files 'not supported'. Freezes on blocksize 16384 | |
| Onkyo TX-NR686 | Limited | OK | Limited | OK | NOK | OK | OK | OK | Limited | OK | NOK | Heavy stutter with blocksize 16. Does not play non-standard samplerates. Does not play current format variable blocksize files but does play 'pre-2007 format' variable blocksize files. Does not play 4.0, 5.1 and 7.1 files but does play 5.0 and 6.1 as stereo and 3.0 as 3.1. | |
| Panasonic TX-60CX750E | OK | OK | Limited | OK | OK | OK | OK | OK | Limited | OK | OK | OK | Based on libFLAC 1.2.1. Stretches non-standard samplerates. Does not output more than 2 channels over HDMI |
| Pioneer BDP-150 | Freezes | Limited | Limited | OK | Freezes | OK | Freezes | Limited | Limited | OK | Freezes | Stretches non-standard samplerates to 44.1kHz. Freezes on any non-standard blocksize, on variable blocksize streams and files more than 6 channels. Incorrect decoding (short noisy bursts) of RICE2 partitions with escape codes. Incorrect decoding (garbled audio) of LPC with qlp precision of 2. Stutters on 192kHz with 32th order predictors | |