[ecasound] ecasound-2.5.2 wrongly displayes clipping info ?

Hello All,

I've noticed the following:

1)
(audiofx) Peak amplitude, period: pos=0.99997 neg=0.99997.
(audiofx) Peak amplitude, all : pos=0.99997 neg=0.99997.
(audiofx) Clipped samples, period: pos=70 neg=122.
(audiofx) Clipped samples, all : pos=70 neg=122.
(audiofx) Max gain without clipping, all: 1.00003.

2)
(audiofx) Peak amplitude, period: pos=0.99997 neg=0.99997.
(audiofx) Peak amplitude, all : pos=0.99997 neg=0.99997.
(audiofx) Clipped samples, period: pos=30 neg=6.
(audiofx) Clipped samples, all : pos=30 neg=6.
(audiofx) Max gain without clipping, all: 1.00003.

3)
(audiofx) Peak amplitude, period: pos=0.99997 neg=0.99997.
(audiofx) Peak amplitude, all : pos=0.99997 neg=0.99997.
(audiofx) Clipped samples, period: pos=545 neg=260.
(audiofx) Clipped samples, all : pos=545 neg=260.
(audiofx) Max gain without clipping, all: 1.00003.

4)(audiofx) Peak amplitude, period: pos=0.99997 neg=0.99997.
(audiofx) Peak amplitude, all : pos=0.99997 neg=0.99997.
(audiofx) Clipped samples, period: pos=152 neg=59.
(audiofx) Clipped samples, all : pos=152 neg=59.
(audiofx) Max gain without clipping, all: 1.00003.
.

In all these cases amplitude is leaa than 1, i.e. there is no clipping,
the signal can still be amplified without clipping, but number of clipped
samples is not 0.

To me all these records are self-contradictory.

Could anyoine please explain me what is happening here ?

There are a lot of normal records, like these ones:

(audiofx) Peak amplitude, period: pos=0.87939 neg=0.89938.
(audiofx) Peak amplitude, all : pos=0.87939 neg=0.89938.
(audiofx) Clipped samples, period: pos=0 neg=0.
(audiofx) Clipped samples, all : pos=0 neg=0.
(audiofx) Max gain without clipping, all: 1.11187.

,
(audiofx) Peak amplitude, period: pos=1.00000 neg=1.00000.
(audiofx) Peak amplitude, all : pos=1.00000 neg=1.00000.
(audiofx) Clipped samples, period: pos=271 neg=197.
(audiofx) Clipped samples, all : pos=271 neg=197.
(audiofx) Max gain without clipping, all: 1.00000.

- well, this latter one is not quite normal because amplitude is 1, and
IMO for clipping to be true it should be more than 1.

Thanks,
  Sergei.

-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
Ecasound-list mailing list
Ecasound-list@email-addr-hidden
https://lists.sourceforge.net/lists/listinfo/ecasound-list
Received on Sun Aug 31 04:15:04 2008