Differences between version 21 and predecessor to the previous major change of SoundProcessingNotes.
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| Newer page: | version 21 | Last edited on Saturday, December 27, 2003 12:00:14 pm | by DanielLawson | Revert |
| Older page: | version 20 | Last edited on Thursday, December 25, 2003 4:02:47 pm | by AristotlePagaltzis | Revert |
@@ -21,9 +21,9 @@
I had seen an article on gramofile on LinuxJournal or SlashDot or somewhere, and thought I'd give it a try. It's located at http://panic.et.tudelft.nl/~costar/gramofile/. One thing I noticed - it's had no work done in over two years!. There is actually a fork of the project at http://www.schou.dk/linux/gramofile/ which has advanced it somewhat, although the author of the fork calls it a hostile takeover, apparently in complete ignorance of how OSS projects work.
-Using gramofile 1.6 (the 'old' version) was pretty easy. It locates track boundaries, separates the input .wav into tracks, and then performs some click reduction on it. The track finding algorithm was a bitch
enthusiastic, and the click reduction was ok but there was still a large amount of noise.
+Using gramofile 1.6 (the 'old' version) was pretty easy. It locates track boundaries, separates the input .wav into tracks, and then performs some click reduction on it. The track finding algorithm was a bit
enthusiastic, and the click reduction was ok but there was still a large amount of noise.
So, I tried using audacity, which also featured in an article I read recently. Despite some UI problems (you cant skip to an arbitrary point in a .wav while its playing, you have to stop, wait a bit, click where you want the cursor to go to, then press play again) it seemed ok. It provides noise reduction and so on, but most of its effects were more focussed on 'effects' (wahwah, etc) rather than cleaning up old vinyl recordings.
I also had a play with !DartPros cleanup functions. It has a wide range of predefined tools - !DeHiss, !DeClick, !DeNoise, !DeHum and so on, and allows you to build up a custom filter using mixtures of these filters.
@@ -122,4 +122,15 @@
It's now Christmas day. I made a few CD copies of what I acheived last night, which sounded at the time like a great improvement. I'm sure it was a great improvement, however its wise to use the correct speed setting when playing back records. I'd been testing the input with a Faith No More LP (45), and forgot to flick the speed setting back down when I started with Music for the Feast of Christmas.
I'm thinking of stamping a label on the CDs I wrote calling them "Music for the Feast of Christmas, by the Chipmunks of Ely Cathedral"
+
+!! Fifth Attempt.
+
+It turns out my last two attempts were both almost there. Had I initially recorded at 33rpm, not 45, I would have had a perfect encoding I think. When I reprocessed the track after recording at 33, I had set the noise reduction parameter up to high, and I think this was causing a lot of clipping in any high 's' sounds (quite common in choral pieces, especially in latin, as a lot of this album is in).
+
+So, back to drawing board.
+
+Some notes about CD Burning, while I'm here. I burned a copy of my album with k3b, and it seemed fine. It played in my stereo, etc. I checked a few tracks. I then burned another copy, which I took round to my fiancees families place. It wouldn't play in their stereo. Upon closer inspection, it *hadn't burnt*. Same problem I was having with using cdrdao from the command line. I phoned home at some point to get them to play the one I had burned and tested, and it didn't work either!
+
+So, once more, it seems as though I'm forced to say that writing audio cds under 2.6 with an ATAPI cdwriter (not using ide-scsi) is broken at this stage.
+If someone can do this reliably (that is, write audio cds under a 2.6.0-test11 or more recent, using cdrdao 1.1.7 or cdrtools 2.01-alpha20, with an ATAPI cdwriter using ide-cd, NOT ide-scsi - I dont care if you can do it under 2.4, or using ide-scsi, or with a scsi cdwriter), let me know how you manage it? Especially if you are authoring audio cds and not just copying them.
