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| Thread ID: 31612 | 2003-03-27 04:18:00 | Or, given its age, should this be a new topic? | rugila (214) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 131350 | 2003-03-27 04:18:00 | I want to transfer some birdsong tapes to CD. Now it's easy and compact enough to transfer music tapes that I (or you) can hear to CD in MP3 format. But I understand one aspect of MP3 compression is that it eliminates frequencies outside the range of the human ear. However some birds, eg. tui, often sing in frequencies outside of human hearing range. But I still need these on the CD. Is it necessary to use WAV format, or is there some other more compressed format that can still include frequencies that MP3 doesn't? Alternatively, can one option MP3 in such a way that one has user control over the included frequencies? |
rugila (214) | ||
| 131351 | 2003-03-27 04:27:00 | most lossy compression cuts off what the human ear can't hear. if you are doing it to cd then just use wave's. if you want a smaller copy then you will need to use a lossless codec such as monkeys audio or fallac (not to sure of the spelling but it should be found at sourceforge.com). | tweak'e (174) | ||
| 131352 | 2003-03-27 04:32:00 | i can't spell as per usual. its flac. homepage here (http://flac.sourceforge.net/) | tweak'e (174) | ||
| 131353 | 2003-03-27 04:37:00 | I wouldn't worry rugila. The frequency roll-off of audio tapes and tape heads will have eliminated all of thise HF signals anyway. Those bird calls would probably go above 20 kHz and I dont know of any domestic tape/deck combination that gets within a bulls roar of that. Even the top line decks pre-CD didn't go that far up. I doubt that your tape will go much above 12 kHz, and anything higher will be swamped by tape hiss. Cheers Billy 8-{) |
Billy T (70) | ||
| 131354 | 2003-03-27 04:54:00 | The metal tapes ,which were the best of the tapes, only went up to 16Khz anyway. | Pheonix (280) | ||
| 131355 | 2003-03-27 05:12:00 | Billy T and Pheonix. I'm sorry to (once again) have to disagree, but the master recordings used VERY high quality audio equipment that was designed for this specific type of purpose. On slowing these tapes, the higher frequencies do come into human hearing range and I (or you if available) can hear them quite OK. That is to say that the HF's are certainly on the tapes, and I need to CD them, hence my post. |
rugila (214) | ||
| 131356 | 2003-03-27 06:54:00 | Sigh............................ :| That's the problem when people don't give enough information in their posts and we are expected to second guess them. :8} Your situation would be virtually unique rugila, not only that you have tapes of that quality, but that you have the equipment to play them back as well. Good luck in preserving those supersonic overtones. You are up against the mundane and price-driven technology of the consumer age. Cheers Billy 8-{) |
Billy T (70) | ||
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