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How to do an ABC/HR test with lossless samples

A bit offtopic but how can I do an ABC/HR test having lossless samples? The HA wiki doesn't tell me enough.

How to do an ABC/HR test with lossless samples

Reply #1
A bit offtopic but how can I do an ABC/HR test having lossless samples? The HA wiki doesn't tell me enough.


What do you mean with lossless samples? You have lossy files encoded in a lossless format or do you really want to test lossless? The latter makes no sense. For the former, there is Options -> Settings -> Decoders.

How to do an ABC/HR test with lossless samples

Reply #2

A bit offtopic but how can I do an ABC/HR test having lossless samples? The HA wiki doesn't tell me enough.

What do you mean with lossless samples? You have lossy files encoded in a lossless format or do you really want to test lossless? The latter makes no sense. For the former, there is Options -> Settings -> Decoders.

I want to conduct a listening test myself. I've lossless tracks but I don't know how to set it all up. First do I have to convert manually to lossy formats by using for example foobar2000? I suppose so, but what's the next step then? Setting up a new ABC/HR Test using ABC/Hearing Reference for Java? A simple guideline would be enough.

Maybe this topic should be split off.

How to do an ABC/HR test with lossless samples

Reply #3


A bit offtopic but how can I do an ABC/HR test having lossless samples? The HA wiki doesn't tell me enough.

What do you mean with lossless samples? You have lossy files encoded in a lossless format or do you really want to test lossless? The latter makes no sense. For the former, there is Options -> Settings -> Decoders.

I want to conduct a listening test myself. I've lossless tracks but I don't know how to set it all up. First do I have to convert manually to lossy formats by using for example foobar2000? I suppose so, but what's the next step then? Setting up a new ABC/HR Test using ABC/Hearing Reference for Java? A simple guideline would be enough.

Maybe this topic should be split off.


First of all, I recommend using WAV. What you have to do is have the reference and name is something like "sample01.wav" (this is only an example, the name doesn't matter). Then use this reference to encode to MP3, AAC, whatever lossy format you want. You can encode with fb2k or directly using the different command line encoders. At the end, you should have lossy files. Then decode these lossy files to WAV and name them "sample01_1.wav", "sample01_2.wav" etc. (again, this is only an example). When you have your WAVs, open ABC/HR and tell it that you want to set up a new ABC/HR test. You can type in the name of the test, then choose the reference and in the middle of the window start to add the actual samples (again, I recommend all as WAV) by selecting a file, then choose add, then browse for the second file, choose add, etc. After that you can let ABC/HR calculate gain and offset so that all files have the same loudness and start at the same sample. If you want, you can also generate an encryption key and then use it to encrypt the configuration files (and later the results).

By the way, I also recommend this document from Roberto: http://www.rarewares.org/rja/ListeningTest.pdf

How to do an ABC/HR test with lossless samples

Reply #4
That's it! Thanks Sebastian!

 
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