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3ll3d00d

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Everything posted by 3ll3d00d

  1. 3ll3d00d

    The Bass EQ for Movies Thread

    ok problem solved, adding an aformat step (to convert to dbl and then back to s32) around the biquads fixes the issue.
  2. 3ll3d00d

    The Bass EQ for Movies Thread

    Looking at it some more (and checking the code at https://www.ffmpeg.org/doxygen/2.8/af__biquads_8c_source.html) suggests it really should be possible to avoid this problem unless something else in the chain clips it. Will dig a bit further.
  3. 3ll3d00d

    The Bass EQ for Movies Thread

    I like the quick test https://imgur.com/a/8HopqIx which shows there is zero headroom available. I suppose this is not that surprising as ffmpeg filters are treated as completely independent blocks. not ideal though perhaps not a blocker as it would be simple enough to attenuate before filtering, good enough for analysis purposes perhaps (though not for the "create remuxed file" case) sample command for reference - https://gist.github.com/3ll3d00d/40be3ec6e1a5c0466ae324350be65cb0#file-gistfile1-txt
  4. 3ll3d00d

    The Bass EQ for Movies Thread

    I think I've worked out the incantation required to get ffmpeg to apply filters to individual channels so was thinking about how to test whether it does this correctly (re the concerns mentioned earlier about clipping). Any suggestions on what a simple, easily repeatable, test would be for this? i.e. generate a specific signal, apply some filter, output should be x.
  5. 3ll3d00d

    The Bass EQ for Movies Thread

    this is built with pyinstaller so it should just mean download it and run it, nothing else required at all (except for the only known external dependency, i.e. libsndfile) all my linux boxes are configured the same way though so hard for me to tell if it works in other situations, could spin up a VM I guess...
  6. 3ll3d00d

    The Bass EQ for Movies Thread

    @Kvalsvoll I built the latest build on my (debian testing) box, I don't have any other distros here to try it on but it works on this machine so give it a try and see if it works. https://github.com/3ll3d00d/beqdesigner/releases/download/0.0.3/beqdesigner
  7. 3ll3d00d

    The Bass EQ for Movies Thread

    I haven't tried it myself but https://github.com/bmc0/dsp/wiki/System-Wide-DSP-Guide gives an example of how to use LADSPA for system wide dsp. It looks like there is a script for converting REW filters into a format LADSPA can use too so that might make it quite easy. Another (not free) option would be jriver as their linux build now has video support.
  8. 3ll3d00d

    The Bass EQ for Movies Thread

    That is correct, it will get added at some point though.
  9. 3ll3d00d

    The Bass EQ for Movies Thread

    There seems to be some confusion about what the app actually is at this point in time so let me clarify. It's an interactive *per channel* minimum phase filter designer with the tools required to quickly and easily work with either mono bass managed tracks or multichannel tracks, i.e. designing pre or post BM BEQ filters. Interactive means it must be quick hence the filter view is based on the transfer functions. Obviously this wouldn't work if we were trying to combine channels but we're not (except when extracting the source track which is pre filter) so this is fine. A post filter clipping check is something I am aware of and had logged it at https://github.com/3ll3d00d/beqdesigner/issues/19 a while ago. This isn't hard to implement (both sox and ffmpeg can apply biquads) so it's just a question of time and desire to implement the feature. One could also implement this in python using scipy or there are other python libs (with an underlying C impl, e.g. http://ajaxsoundstudio.com/pyodoc/) that could also be used if scipy is too slow. Having said that I would have thought that would be something that happens relatively infrequently as a final check so working with existing cli tools seems fine to me and would be quick and easy to implement. @Kvalsvoll the bit I don't get is why you want to remux that back into the original track. If you're playing an mkv then you're already on a computer that can do the filtering in real time so why would you want to alter the source itself?
  10. 3ll3d00d

    The Bass EQ for Movies Thread

    I don't know what this could be, you can go to Help > Show Logs (or press Ctrl+L), put it in debug and then repeat the activity to see if that tells you anything else https://imgur.com/a/oTqQ0VF I'm not sure what to do about the colour scheme, I've used the speclab style so far simply because it is what people are familiar with but this doesn't work for many signals (not enough shades and they're too close together). Note the controls in the bottom right of the main window let you turn the legend off if you prefer and choose which signals and/or filters are actually displayed. https://imgur.com/a/4iSEnZZ Interesting idea, noted in https://github.com/3ll3d00d/beqdesigner/issues/38
  11. 3ll3d00d

    The Bass EQ for Movies Thread

    if you uncheck the "mix to mono" checkbox and click extract then once it finishes, the button should change to "Create Signals" and the field at the bottom will be enabled. Put something in here and click "create signals". https://imgur.com/a/uoOh3Hr It should then automatically close the dialog and add each channel as a separate signal using the channel names (taken from https://trac.ffmpeg.org/wiki/AudioChannelManipulation#Layouts) https://imgur.com/a/y7GGUU2 If this doesn't happen then feel free to log something with appropriate steps to reproduce/pics/supporting files over at https://github.com/3ll3d00d/beqdesigner/issues similarly if you think of any interesting features then do also feel free to suggest them, I'll probably work on this for a little while longer at least.
  12. 3ll3d00d

    The Bass EQ for Movies Thread

    Can you be more specific about steps to reproduce? as it seems fine here and for some other users (not to say there can't be bugs of course 😀 )
  13. 3ll3d00d

    The Bass EQ for Movies Thread

    There's a new release up at https://github.com/3ll3d00d/beqdesigner/releases/tag/0.0.2-beta.3 which should be sufficient for BEQ pre BM in that it can extract multichannel wavs and link multiple signals together against the same filter. This means you can do something like * extract an 8 channel wav from a 7.1 film * load all 8 signals in BEQ (they will be named xyz_FL xyz_FR and so on after the channel layout) * link FL, FR, FC together under 1 filter, LFE on another and the surrounds on another * tweak each filter independently * save the result to a shareable (gzipped json) format that anyone else can load * save pngs and/or graph the difference between signals This should work on linux without the hack above as I removed the offending library. I haven't had a chance to test this yet though.
  14. 3ll3d00d

    The Bass EQ for Movies Thread

    git clone git@github.com:3ll3d00d/beqdesigner.git cd beqdesigner git checkout 0.0.2-beta.2 python3 -m venv beq . beq/bin/activate pip install numpy colorcet scipy qtpy qtawesome pyqt5 matplotlib ffmpeg-python soundfile resampy cd src/main/python # you also need ffmpeg and libsndfile1 installed, e.g. sudo apt install ffmpeg libsndfile1 then open mpl.py in a text editor and change the following change for k, v in cc.cm_n.items(): to for k, v in cc.cm.items(): (this is due to some lib having an older version in pypi vs conda, it is fixed in next release) then python3 app.py and you should find it fires up I'll get round to packaging it properly for linux soon enough next release will properly support pre BM BEQ btw, will publish that tomorrow hopefully I run Debian Testing here and it seems ok, haven't tested it extensively though so let me know if problems, will get round to testing it properly on linux at some point. The same approach has also been used on the mac too btw.
  15. 3ll3d00d

    The Bass EQ for Movies Thread

    atm there is one filter which is applied to all loaded signals, extending this so you can map different filters to different signals (channels) is high on the list of things to do. It needs to come after being able to load/save filter sets & some tweaking to the way graphs are created though.
  16. 3ll3d00d

    The Bass EQ for Movies Thread

    latest build allows you to stack shelf filters and define them in S or Q so should make it easy to report filters in jriver compatible format or for other software
  17. 3ll3d00d

    The Bass EQ for Movies Thread

    FWIW I decided to knock up an little ui to make experimenting with BEQ easier (so it can extract audio using ffmpeg & show the results of adding assorted filters, comparing tracks) hence it removes the need to faff around with speclab). An early release (windows only atm as I'm away from my linux boxes) is available at https://github.com/3ll3d00d/beqdesigner/releases/tag/0.0.1-alpha.2 Here's a pick to illustrate https://imgur.com/a/KgfaxOJ This is still a fairly early build (and the exe is a bit massive) but it seems to be usable so thought I'd share it. The readme at github has some of the things left to do and some bugs. One thing not mentioned there is being able to apply different filter sets to different signals. EDIT: I replaced the exe with something that should display errors if you start it from a console (as someone on avs reported it didn't work for them) EDIT2: possible workaround in https://www.avsforum.com/forum/113-subwoofers-bass-transducers/2995212-bass-eq-fil-turd-movies.html#post56692822
  18. 3ll3d00d

    The Bass EQ for Movies Thread

    I have raised this on a few occasions. There was some interest shown at the start of the current release cycle in doing some work on their DSP studio but no sign of action so far (and they usually add features tbh rather than fix things like this)
  19. 3ll3d00d

    X-curve compensation re-EQ

    Yes that is part of the audiophile style marketing they use. You will also find not many measurements are available to verify what it is actually doing and how well it performs. FWIW I think https://patents.google.com/patent/US8094826?oq=8094826 is their patent, it seems pretty generic to me though. To be fair I have listened to their high end kit and it is good so there some substance there, it isn't just audiophile blather.
  20. 3ll3d00d

    X-curve compensation re-EQ

    fwiw this is basically the way roomperfect is marketed (albeit with a healthy dollop of audiophile voodoo mixed into the language used)
  21. 3ll3d00d

    Woofer for 40-250Hz?

    finally received the amp so should be able to fire this up properly soon https://imgur.com/a/CPjzmq5 I did test the initial XO and I think the woofer filter hasn't come out quite right, some details in http://www.diyaudio.com/forums/multi-way/292379-syns-post5471697.html need to get time to investigate that but frankly it's been too hot in London recently to consider doing anything except idly watching the World Cup while drinking cold beer
  22. 3ll3d00d

    Woofer for 40-250Hz?

    I'm looking for a woofer suitable for use in the ~40-250Hz range and that is comfortable in a relatively small enclosure and ideally could be used in either ~40L sealed or ~75L ported. Intended use is HT as the bottom end of the LCR but which will also receive that portion of the LFE (i.e. want to be able to try spreading the LFE down to this point across the LCR). Not too concerned about cost really. Drivers I've modelled so far include FaitalPro 15XL1400 - 15XL1400 by FaitalPROBeyma 15p80Nd - LOW & MID FREQUENCY 15P80Nd | Beyma18sound 15nlw9401 - 15NLW9401BMS 15n840 - Overview Current favourite is the BMS. Any other suggestions or personal experience of such drivers appreciated.
  23. 3ll3d00d

    BMS 18N862

    It's still listed on the BMS site and appears to be readily available in Europe
  24. 3ll3d00d

    Woofer for 40-250Hz?

    I did give it a sweep through dats and used the rub and buzz test, seems ok. Will hook it up to an amp soon to make sure. There are two different uses here. I have built one to try out the smallsyns so I can decide whether to build 3 more to use in my cinema setup. This one will be used by a local choir for their rehearsals so will have much more limited output requirements. I could probably have got away without the woofer for this one but I thought it would be handy for trialling the speaker as I intend to use it. This means a woofer happy in a pretty small box (~1ft3), the fp looks good for that. The AE will replace the woofers in my current 3 way LCR regardless of whether I build the smallsyns. These will be in bigger boxes (maybe 2.5ft3) and need markedly more output capability. The AE were the best ones I modelled for this job.
  25. 3ll3d00d

    Woofer for 40-250Hz?

    The TD12 turned up today, just about safe and sound albeit no thanks to UPS who appeared to have played football with one of them 😐
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