Kurt...."held recorder in SHQ more (192kb mp3) works every time for me." THAT is the equation! A minimum of 192k for MP3 files.
________________________________ From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Stephen Adolph <twospru...@gmail.com> Sent: Tuesday, October 2, 2018 2:52 AM To: m...@bitchin100.com Subject: Re: [M100] Audacity Waveform looks good and similar to mine. However Not at max signal swing. I may have to boost it. On Monday, October 1, 2018, Stephen Adolph <twospru...@gmail.com<mailto:twospru...@gmail.com>> wrote: Thanks. I will check that out and compare to my waveforms. On Monday, October 1, 2018, Kurt McCullum <ku...@fastmail.com<mailto:ku...@fastmail.com>> wrote: Sony ICD-PX333 hand held recorder in SHQ more (192kb mp3) works every time for me. In fact I gave up trying to record with my PC because I had so many issues. I've also used an older 720 model and it worked just as well. I could never get my PC to stop messing with the audio when I tried to record. I'm sure there is a way to do it but I gave up and used the voice recorder once I realized I was getting 100% reliability with it. I don't use it much any more but I always have it in my bag when I travel, just in case. There are a couple of files that I put up in the members file area if you want to test the playback on your PC or phone. Ram version of TS-DOS 100/102 www.club100.org/memfiles/index.php?action=downloadfile&filename=DOS100.CO.MP3&directory=Kurt%20McCullum&<http://www.club100.org/memfiles/index.php?action=downloadfile&filename=DOS100.CO.MP3&directory=Kurt%20McCullum&;> Time Minder for the 200 www.club100.org/memfiles/index.php?action=downloadfile&filename=TMX.CO.MP3&directory=Kurt%20McCullum/Time%20Minder&<http://www.club100.org/memfiles/index.php?action=downloadfile&filename=TMX.CO.MP3&directory=Kurt%20McCullum/Time%20Minder&;> I've played them back on a PC and they worked fine but most of the time I play them back on the Sony. Max volume. Kurt On Mon, Oct 1, 2018, at 6:51 PM, Stephen Adolph wrote: This subject always interests me. But it is frustrating. I've been playing around with the files on Sonora.us. awesome effort to put that together! I do have some comments though. 1. The audio files don't work for me in any scenario so far. I believe that at least some of them are distorted. I have not looked at them all. When I compare the signals generated by an m100 to the audio files using a scope there is a really big difference. 2. As an aside I found that my pc audio output had a DC offset! That was really hard to work with. I has to make a cable with a series capacitor to get the setup to work at all 3. Once I obtained *good* sample files, the number one determinant of a successful readback is drive signal level . Only my PC seems to be able to generate enough swing. 4. Wav vs mp3. Both are usable. Once all the issues have been sorted these two file types seem to work equally well. Mp3 a lot smaller!! 5. T200 is pretty robust and not sensitive to volume that much. T102 seems to be more sensitive while m100 seems on the edge of working at all. Maybe it is specific to my machines. All the circuits are the same on the schematic so I have no explanation. 6. I use LINE IN for sampling and LINE OUT for playback on the PC. 7. I amplify the sample files to maximum in the audacity effects menu. 8. None of my portable devices Samsung s8 old Sony expedia nor my mp3 player have enough drive signal to be reliable. I hate to say it but i believe that the files on the site may need to be resampled. I think the approach of sharing the files over the net is fine but the audio files should look like a low pass filtered square wave. I can send traces of M100 actual output of anyone is interested. Anyhow that is where I got to. I still don't have a reliable working portable solution for cassette audio. Anyone out there having a different experience? Steve
