When playing a tape on the right side the drive will stop as if at the end of the tape. This is during playback, seems to be random and may happen several times.
Also, What is the difference between...
First - your drive problem. Nearly all tape decks use belts to drive the various parts from a single motor. When belts get old, dirty, or worn, they slip. At some point, if the tape gets a bit "heavy" the belt doesn't have the torque to keep things moving. You can try cleaning the belt if you can get to it. Use some isopropyl alcohol and a lint free paper towel. This may only provide a temporary fix and a new belt may be needed. If you have one of the high-end direct drive units (rare in side by side decks) then the drive motor has an issue.
Ah Dolby. Where to start. To answer your question as asked, B and C refer to different "curves" used by the Dolby to reduce tape noise.B came first obviously. The real issue with ANY Dolby is that it is a 2 part system. A tape must be encoded with a Dolby unit for proper playback with Dolby. So, you would have to know that the tape was recorded with Dolby B and you would select Dolby B for playback. The Dolby will "appear" to reduce noise on any tape because it will roll off the high frequencies but the frequency response will be all messed up. To further complicate this mess, any Dolby circuit really needs to be properly calibrated to work 100% as intended. In consumer gear, this is nearly impossible so they settled for a close approximation. In pro studios, Dolby encoded tapes included set up tones at the front of the tape so the engineer doing the playback could align his system to the recording system. All that complexity is why DBX came along with their system but Dolby had good marketing and it was "close enough" that people liked the hiss reduction even when applied to a non-encoded tape. Of course, people tolerate MP3s for the convenience too.
Anyway, hope that helps. Look for the Dolby symbol on the recorded tape. If it is there, it will tell you if it is B or C curve - select accordingly. If not- it probably was not encoded and you'd have better frequency response using the "off" setting.
Oct 23, 2010 |
Audio Players & Recorders