On Sun, 06 Feb 2011 16:02:04 -0500, Samuel Mimram <[email protected]> wrote:
> Hi, > > On Sat, Feb 5, 2011 at 7:00 PM, <[email protected]> wrote: > >> I would like to apply a filter on this show's audio file. However, >> I'm not sure which filter would be best. On my Marantz studio monitor >> amp, I have decreased the hiss significantly by using 'Hi-Filter'. >> What would be the equivalent filter in Liquidsoap that would do the >> same job? >> > > You should describe more precisely what your hiss looks like (or better > provide a sample). Does it sound like white noise or sine or whatever? At > high or low frequency? etc. I ran a *silent* section through Audacity > Analayze, and it peaks (-30db) at around 30 Hz, so I guess I need a high-pass filter. It sounds like white noise. So, would c = filter(freq=30.,q=1.,mode="high",c) be a good starting point? > > For example, if your noise is at high frequency, then you can try to > remove > high frequencies of your sound using a low-pass filter, e.g. > > c = filter(freq=5000.,q=1.,mode="low",c) > > The freq parameter is the frequency above which the sound will be lowered > and q is the sharpness of the filter. To get good results you should > really > play with those parameters. > > There are more advanced and precise filters available in Liquidsoap but > really it depends on what you want to do exactly and is a complicated > matter. But you should be able to get a good starting point with the > "filter" operator as described above. > > ++ > > Sam. Thanks, andre -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ ------------------------------------------------------------------------------ The modern datacenter depends on network connectivity to access resources and provide services. The best practices for maximizing a physical server's connectivity to a physical network are well understood - see how these rules translate into the virtual world? http://p.sf.net/sfu/oracle-sfdevnlfb _______________________________________________ Savonet-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/savonet-users
