foo_dsp_effect, A effect array for FB2K Options

[mudlord]

well it would be very helpful to know what tag it uses....

[markanini]

This delay between channels is added intentionally - in purpose of widening stereo basis. Stereo widening effects (like making stereo from mono signal) are always based on adding interchannel delay. So such DSP will be destroying effect rather than sound tuning effect.

Youre referring to Haas effect processes which are sometimes applied to a few instrumments in a mix. It's more common in the DAW era with the exception for some experiments in the 1960s where the intentional delays were orders of magnitude higher than the unintentional delays from tape transport misalignment.

I'll put forward my feature suggestion again: Please consider an effect for adding a small delay on either LR channel controlled by a custom tag field. The field value might look something like: 'L5' denoting the L channel be delayed by 5 samples. A range of 1-50 samples would be plenty for 44100Hz.

This post has been edited by markanini: Jan 25 2013, 04:30

[mudlord]

and I say:

http://www.hydrogenaudio.org/forums/index....st&p=794716

im pretty much done with this component and many things in general.

This post has been edited by mudlord: Jan 25 2013, 22:16

[kode54]

Sounds like an interesting effect, although I would rather implement it using something more serious. Although I would probably take to a bit of mockery by making it a foo_dsp_silly_effects component.

Yeah, mudlord made a lot of effects he thought would be useful, but now feels some of these are just getting too silly for him to consider, even if they would be fairly easy to implement. I could get to work on some of this crap later.

[mudlord]

Yes, easy to implement.
A) get your current track via play_control
B) get your file_info from the metadb ptr given
C) Parse tags using file_info methods.
D) do delays based on timing from tags

Honestly though, cannot be arsed though. What annoyed me greatly is now I am getting requests outside the scope of what I intended for this component to be. And plus, I can't find a personal use to implement them.

[EpicForever]

I'm not sure weather this issue is caused by foo_input_exe or foo_dsp_effect so i post it in both threads, maybe authors will find what can be wrong.
My DSP chain looks like this: Skip Silence - > convert 5.1 to stereo -> convert mono to stereo -> playback rate shift. Playback Rate Shift requires 2ch signal. So used DSP effects provide such signal.
When I play 6ch FLAC encoded from DVD-A everything works OK. Signal is downmixed and I can use PRS actively or just unused, but present in chain. But when I play audio from video files and I use foo_input_exe to wrap signal decompressed by FFMPEG.exe from that files, then 6ch audio decoded from .VOB file generates error: "Unrecoverable playback error: Illegal number of channels". It means that Playback Rate Shift gets 6ch audio instead of 2ch - like "convert 5.1 to stereo" wasn't working or something like this... Why? What can I do to avoid this error in such playback configuration?

[Porcus]

You have likely been home in the meantime, but anyway, dBpoweramp uses <PRE-EMPHASIS>, value 'Yes'. Different value, different tag name (note the hyphen).

(Myself I store those pre-emph'ed CDs in a different format (great excuse to pay homage to WavPack) just in case I accidentally delete tags, so I don't mind doing the extra work to write another tag to them.)

[mudlord]

I'm not sure weather this issue is caused by foo_input_exe or foo_dsp_effect so i post it in both threads, maybe authors will find what can be wrong.
My DSP chain looks like this: Skip Silence - > convert 5.1 to stereo -> convert mono to stereo -> playback rate shift. Playback Rate Shift requires 2ch signal. So used DSP effects provide such signal.
When I play 6ch FLAC encoded from DVD-A everything works OK. Signal is downmixed and I can use PRS actively or just unused, but present in chain. But when I play audio from video files and I use foo_input_exe to wrap signal decompressed by FFMPEG.exe from that files, then 6ch audio decoded from .VOB file generates error: "Unrecoverable playback error: Illegal number of channels". It means that Playback Rate Shift gets 6ch audio instead of 2ch - like "convert 5.1 to stereo" wasn't working or something like this... Why? What can I do to avoid this error in such playback configuration?

Weird, doesnt sound like a problem on my end if the "convert 5.1 to stereo" isnt working. Indeed, the SoundTouch based DSPs only work on stereo channels.

[EpicForever]

Just for your information mudlord - it turned out that it might be a problem in handling of channel mask by "Convert 5.1 to stereo" plugin. Surround channels aren't properly handled (SR, SL) while back channels (BL, BR) are. That was said to be solved on Peter's end in "Convert..." plugin. So PRS doesn't trigger any problems in above scenario

This post has been edited by EpicForever: Feb 3 2013, 13:50

[lvqcl]

a bug found: http://www.hydrogenaudio.org/forums/index....st&p=824194

[mudlord]

noticed the problem with the aliasing and such

mudlord.info/temp/foo_dsp_effect.zip
mudlord.info/temp/foo_dsp_effect_nodemph.zip

This post has been edited by mudlord: Feb 19 2013, 10:45

[EpicForever]

Question - does regular version of foo_dsp_effect contains POSTPROCESSOR service for de-emphasis or only DSP/IIR filter based De-emphasis functionality? I can't find it in documentation on regular download site (foobar2000.org/components).

[Rollin]

Postprocessor

The tag "PRE_EMPHASIS" must be used on content which is supported by FB2Ks decode processor services, for this to work. Pre-emphasis can be signified in your media with the values "1" or "0".

[EpicForever]

(...) I think about possibility of preserving information about preferred Playback Rate Shift, Pitch Shift and Tempo Shift for certain files in tags. It could be done like this: user manually adds tag field to his file - for exampla tag named "PRS" (for "Playback Rate Shift") and puts there a value - for example "+5" or "-10". Active DSP reads tag field and automatically applies shift. (...)

EpicForever
http://www.hydrogenaudio.org/forums/index....showtopic=96094

I used it and it works great it takes some effort to configure it (chains, tags, dsp config) but it gives me desired option. Thx again

[EpicForever]

One question - is it possible to make foobar display length of track after playback rate shift modification? I'm thinking mostly about status bar.

[mudlord]

No.

[EpicForever]

OK, but you mean impossible because you are not willing to code it or because of foobar's limitations?

[mudlord]

from what I know, the latter.