On Friday 14 July 2006 19:56, Dave M wrote: > At 02:18 PM 7/14/2006 , Anne wrote: > >Has anyone done any speed-adjustment work in audacity? Is it possible? > > You can do this with any editing software that will allow you to re-sample > and equalize the recording. > > Run the output of the turntable into your Mic input. Dont use an amplifier > or equalizer because the equalization curves will be wrong. You then record > your 78 (I typically use 45rpm) to a an uncompressed file. Then resample > the file (by a ratio of 78/45) to speed up the playback. > And you do this in audacity? > After the file is re-sampled, you must then use the software to equalize > and filter the file. If you are going to convert it to an ogg or mp3, only > do so after doing all of the above. > Of course, as with graphics, compression is the last step. > There are lots of equalization curves that where used on 78's so you can > look up the curves or just do it by ear. Also, not all 78's are actually > recorded at 78. The speed ranged pretty widely. As high as 80 and as low as > 75. So if it sounds a bit off key, you can play with the speed ratio in > order to correct the speed. > > Keep in mind that the stylus used on 78's is much larger than the one > typically used on 33's and 45's. Depending on the turntable it takes a > little hunting to find the correct stylus for your cartridge. Last time I > checked, they where still avalable for the Sure cartridge. It is best to > use the correct stylus, using the smaller stylus can damage the record or > the stylus and usually results in a rather distorted recording. > I did note that the gizmo does require a separate stylus. I hadn't thought of the possibility of using a 78 stylus and recording at 45. I must look into that. > You can find more info here: > > http://www.rfwilmut.clara.net/repro78/repro.html > > It is a good idea to archive the uncompressed file (or use FLAC to save it > using loss-less compression). Archive.Org is a repository for the > digitization of these old recordings. I am sure they would love to have a > copy of whatever you digitize. You can upload the files to their website. > You may even be able to find digitized copies of your recordings are > already there. > > Feel free to contact me off list if you have questions. > Thanks for all the info and links. I did quite a bit of transferring to CD a few years back, but never got around to the 78s, and there are still a good few other oddments, 45s, and 7" 33s for instance, that I ought to tackle. It's not worth the bother for standard classics, but there's quite a lot that I'll never find again, and would like to keep. I have a feeling that I may be asking you for help later. Anne
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