| 84512 packages online |
|
|
| | | | No screenshot available |
|
A notch filter (that's what "notchf" stands for) is a band reject filter
with an extremely small bandwidth. It can remove noise at a known single
frequency (e. g. mains hum at 50 or 60 Hz) from a sound recording.
"notchf" can apply several filters in one pass (useful for oscillations
with upper harmonics, e. g. at 50, 100, 150 Hz etc.) and provides control
over the sharpness of the notches (to make hitting the right frequencies
a little easier). Try this on the included example IFF sound:
notchf -f0.015 -f0.030 -f0.045 sspa.iff test.iff
New since V1.0: Better information on the bandwidth of the filters, in
the docs *and* at run-time.
"notchf" is Freeware, C source is included.
|
Contents of mus/misc/notchf.lha PERMSSN UID GID PACKED SIZE RATIO CRC STAMP NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic] 13880 28580 48.6% -lh5- 3266 Aug 17 1996 notchf/notchf
[generic] 3990 10956 36.4% -lh5- f41d Aug 17 1996 notchf/notchf.c
[generic] 2916 6619 44.1% -lh5- 2aa9 Aug 17 1996 notchf/notchf.doc
[generic] 35950 48176 74.6% -lh5- 9eec Aug 17 1996 notchf/sspa.iff
[generic] 265 628 42.2% -lh5- 4df6 Aug 17 1996 notchf.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
Total 5 files 57001 94959 60.0% Aug 18 1996
|
|
|
|
Aminet © 1992-2024 Urban
Müller and
the Aminet team.
Aminet contact address: <aminetaminet net> |