Feature request (Audio Filter)

[DaveMB]

Sorry if this has been asked/answered before.

In WinUAE there was an option to use different audio filters EG: A500 or A1200.

The A500 filter sounded the same as FS-UAE sounds now which is I assume how it is supposed to be, But the A1200 filter seemed to give the sound a lot more 'sparkle', It seemed to boost the higher frequencies and 'to my ears' sounded much better.

Would it be possible to add the A1200 filter....or is it already available via a switch in the config file?

Thanks, Dave.

[FrodeSolheim]

Originally Posted by DaveMB

Sorry if this has been asked/answered before.

In WinUAE there was an option to use different audio filters EG: A500 or A1200.

The A500 filter sounded the same as FS-UAE sounds now which is I assume how it is supposed to be, But the A1200 filter seemed to give the sound a lot more 'sparkle', It seemed to boost the higher frequencies and 'to my ears' sounded much better.

Would it be possible to add the A1200 filter....or is it already available via a switch in the config file?

Thanks, Dave.

Hi, I haven't doublechecked if this is the same setting, but presumable it is (I checked cfgfile.c). Try:

uae_sound_filter_type = enhanced

[DaveMB]

uae_sound_filter_type = enhanced

That's the one, Thank you.

Is there anyway to apply that line globally or do I need to manually edit all of my config files?

[TCD]

If you use the launcher put it in 'Custom Configuration -> Custom Settings'

[DaveMB]

Originally Posted by TCD

If you use the launcher put it in 'Custom Configuration -> Custom Settings'

Excellent, works perfect, Thanks

[Retro-Nerd]

Should work global too. I've deactived the filter and use only interpolated sound, which works fine from global settings.

[amigafreak68k]

I don't know if it makes sence to combine these setting with the A1200 model in future versions so no user option is needed?

[DaveMB]

Originally Posted by amigafreak68k

I don't know if it makes sence to combine these setting with the A1200 model in future versions so no user option is needed?

Possibly, But I use it on all Amiga models as in my opinion it greatly enhances the audio.

[Retro-Nerd]

I think the audio filter sounds much better on real hardware. It's a bliss to disable it in emulation.

[Toni Wilen]

Originally Posted by Retro-Nerd

I think the audio filter sounds much better on real hardware. It's a bliss to disable it in emulation.

Which one? Remember that there is 4 different implementations and imho only one sounds correct enough (and also requires most CPU power).

[Retro-Nerd]

At least the both "Always on" filter doesn't sound good enough. Is the Emulated (Amiga 500) supposed to be the "sounds correct enough" one? The Emulated (Amiga 1200) sounds pretty close to "always off".

[Toni Wilen]

Originally Posted by Retro-Nerd

At least the both "Always on" filter doesn't sound good enough. Is the Emulated (Amiga 500) supposed to be the "sounds correct enough" one? The Emulated (Amiga 1200) sounds pretty close to "always off".

Interpolation mode selects the filter algoritm type. Sinc and Anti work, the rest are useless.

[Retro-Nerd]

I use SINC anyway, but i can't really hear a big difference between always off and Emulated (A1200). I have another question, but will ask in another thread.

[jbl007]

Originally Posted by amigafreak68k

I don't know if it makes sence to combine these setting with the A1200 model in future versions so no user option is needed?

I agree. The A1200 filter type should be the default for the standard A1200/A4000 models because it sounds more like the real machines. But even WinUAE doesn't do that when selecting the A1200 quickstart setting.

Originally Posted by Retro-Nerd

i can't really hear a big difference between always off and Emulated (A1200).

That's because an A1200 does only very little filtering.
According the uade123 manpage the A500 has 2 lowpass filters. A static filter and the "LED-filter" which can be toggled on and off. On later models the static filter was removed.

[FrodeSolheim]

Current defaults in FS-UAE are:
sound_interpol=anti
sound_filter=emulated
sound_filter_type=standard

if sound_filter_type=enhanced correspond better to A1200 sound filtering, I can set that as default when A1200 (and A4000?) models are chosen. Can someone confirm that this is correct?

[DaveMB]

Originally Posted by FrodeSolheim

if sound_filter_type=enhanced correspond better to A1200 sound filtering, I can set that as default when A1200 (and A4000?) models are chosen. Can someone confirm that this is correct?

but then if I have it specified in a config file the option will be getting activated twice?. does it matter?

As said I use it on all configs right down to A500 as to me it sounds far better.

Obviously I can't speak for other users but would it not be better to add a toggle switch so when people set up their configs they can also choose a filter? (independent of other configs) (same as WinUAE)

[FrodeSolheim]

Originally Posted by DaveMB

but then if I have it specified in a config file the option will be getting activated twice?. does it matter?

It would not matter - The config file entry will override the default anyway (and it does not matter if the setting is the same).

Originally Posted by DaveMB

As said I use it on all configs right down to A500 as to me it sounds far better.

Obviously I can't speak for other users but would it not be better to add a toggle switch so when people set up their configs they can also choose a filter? (independent of other configs) (same as WinUAE)

It is already possible to override it "manually" in a config or in custom settings (uae_sound_filter_type = enhanced). Perhaps there can be some GUI for that in the future.

But I have now changed the code so the "enhanced" filter type is enabled automatically with A1200/A4000 models

EDIT: I have also experimented with changing stereo separation to 100% by default (was 70%). This should probably have a GUI control in preferences though.