Vinyl control crashes in absolute mode (Mixxx 1.8 Beta2, r2447)

[RAFFI TEA]

Using vinyl control along with absolute mode causes a crash in Mixxx.

Fatal: []: ASSERT: "start_sample >= 0" in file src\engine\readaheadmanager.cpp, line 60

I used Serato control vinyls. The crash can be reproduced as follows:
1. Set lead in time to 20 s
2. Load a song and drop the needle down
3. If the neddle is in the lead in area and you try to scratch Mixxx crashes.
    In other words: Drop the needle down such that Mixxx is at ---let's say --- play position 5s.
    Spinning back the vinyls below position 0s cause the crash

Tested on Windows XP and 7 with NI Audio 4 DJ at 5ms latency
on Dual Core 2 Duo with 1.67 Ghz and 2.67 Ghz

[RAFFI TEA (raffitea)]

The bug happens only with pitch-independent time-stretch

[RAFFI TEA (raffitea)]

However, using vinyl emulation mode I get a similar crash for a couple of songs

Fatal: []: ASSERT: "start_sample >= 0" in file src\engine\readaheadmanager.cpp, line 60

The songs can be provided on request...

[RAFFI TEA (raffitea)]

After cleaning the needles, viny control has worked fine in vinyl emulation mode. All my former "problem songs" work now. However, such a crash should be avoided in final 1.8 series

[jus (jus)]

A lot of improvements has been made in Owens xwax branch
https://code.launchpad.net/~mixxxdevelopers/mixxx/features_xwax

Tested some times ago and found a really stable ( with Serato timecode, some timing problems with Traktor though).

Might be worth to check out...

[Albert Santoni (gamegod)]

Should be fixed in the 1.8 branch, r2477.

[Swiftb0y (swiftb0y)]

Mixxx now uses GitHub for bug tracking. This bug has been migrated to:
https://github.com/mixxxdj/mixxx/issues/5432