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Recent Posts
2
3rd Party Plugins - (fb2k) / Re: foo_uie_lyrics3
Last post by veksha -
@veksha:  I noticed that you have posted .42 of Multisource over at Reddit.  Can you tell us what changes were made from .41?  I have been having such problem-free results with .41 that I hesitate to update it without knowing if there are any performance improvements I might benefit from.  Thanks.
Hi, @sveakul . I had some very rare crashes with 0.41. @Sergey77 reported some more to private message box. So 0.42 is an attempt to fix them. (My guess is there will be less or almost no crashes on multi-core systems, but on a single-core processor it can happen more often. i'm not a huge expert in developing multi-threaded applications, so I'm learning along the way.)   :))
3
Development - (fb2k) / Foobar.exe's abort_callback in simple_thread_task causing crashes
Last post by MordredKLB -
So I and my users are encountering an intermittent crash that appears to be some kind of timing/race condition thing when aborting searches in my foo_musicbrainz component.

I first query musicbrainz to get a list of matching results, and then I spawn a number of simple_thread_task's, one for each result which does the individual queries. Every one of these threads is spawned from a threaded_process_callback which gets a abort_callback& from foobar and passes it down to all the simple_thread_tasks.

Occasionally, when a user aborts a search I will get access_violations (which crash) attempting to do anything with the abort_callback (i.e. abort->is_aborting()). Unfortunately, all VS2019 will tell me is that abort_callback comes from foobar.exe and provides no useful information, so I can't tell if the ptr is now garbage, or if some value inside the object has been corrupted.

It's real intermittent so sometimes I can abort 20 times in a row and they all exit gracefully, and then other times, the first abort causes it to happen.

I'm encountering this using 1.6.5 and SDK 2021-02-23. Users have reported it in 1.6.6b7 as well.

There is certainly a chance that I'm doing something wrong, but it feels like this is an issue with foobar. @Peter, if this is something you think is worth investigating, you can get the latest beta here with the corresponding pdb.
5
Other Lossy Codecs / Re: exhale - Open Source xHE-AAC encoder
Last post by guruboolez -
Bitrate is not fully comparable: exhale d (SBR) is ~74 kbps and exhale 2 is ~80 kbps (and Exhale e is ~86 kbps on my bitrate table).
Interesting test.  :) 
I guess It wouldn't be bad idea to test both SBR ~74 and ~86 kbps settings and calculate an estimate score (at imaginary ~80 kbps) by averaging both values.
It's indeed a good but time expensive solution.

Some score/MOS estimation of mine for SBR:

50 kbps to 61 kbps [+11 kbps] = +0.49
61 kbps to 73 kbps [+12 kbps] = +0.20
73 kbps to 85 kbps [+12 kbps] = +0.10…0.15 [estimation]
so 80 kbps => +0.05 to +0.07 = 3.77 to 3.79
6
3rd Party Plugins - (fb2k) / Re: foo_musicbrainz
Last post by MordredKLB -
Beta 6 fixes issues with dumb popups when aborting a search. It does not solve the odd crash when aborting, that I think is an foobar issue. Will be opening another thread for Peter to take a look at that.
7
Listening Tests / Re: Personal Blind Listening Test of Opus and the exhale xHE-AAC encoder
Last post by guruboolez -
@Kamedo2  @guruboolez

Is this test at 64k - 80k also relevant when using bluetooth device such as headphones/speakers or is better to use higher bitrate source which is better at transcoding when using bluetooth device? Should 80k be of acceptable quality also for bluetooth?
As I understand, no matter which format/codec is used, transcoding to bluetooth codec always occur.
During the last two weeks I used my smartphone to stream xHE-AAC stream over bluetooth: on my car, but also on earbuds. I only add xHE-AAC encodings on my phone for pop/rock/metal albums (no classical music so far). And the bitrate was… 24 kbps (twenty four, yes—with Fraunhofer's encoder). I know it sounds totally silly but I was really curious to check how it sounds in real life and not only on ABC/HR tests. More than 400 GB are available on my phone+SD card so I have no space issue.

So how does it sound: If I wouldn't replace my FLAC with xHE-AAC at 24 kbps encodings for archiving purpose I must say that with this kind of music sound quality is really great to my ears, especially while listening in the car. I really had a lot of pleasure while listening these albums. Some constant issues are slightly audible but I quickly forget them (precisely because those issues are constant and not erratic). I caught two or three strong and ugly artifacts—which is a ridiculously small amount at this insane bitrate. Just to give an idea: one hour of music only needs 10 MB. As a consequence 1000 hours of music can be stored in a fraction of a SD card or internal memory (10 GB).

My phone feeds my earbuds over bluetooth with AAC and my car with SBC. I don't think it significantly affects sound quality.

So to answer your question: 80 kbps is more than an "acceptable" basis for BT streaming :)

NB: as a consequence of this unbelievable experience I've started today a listening test in order to compare OPUS and xHE-AAC at 12, 24 and 32 kbps  :))
9
3rd Party Plugins - (fb2k) / Re: foo_uie_lyrics3
Last post by sveakul -
@veksha:  I noticed that you have posted .42 of Multisource over at Reddit.  Can you tell us what changes were made from .41?  I have been having such problem-free results with .41 that I hesitate to update it without knowing if there are any performance improvements I might benefit from.  Thanks.
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