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- Path: sparky!uunet!pipex!bnr.co.uk!uknet!warwick!warwick!not-for-mail
- From: cstadbg@csv.warwick.ac.uk (Mr M J Brown)
- Newsgroups: sci.electronics
- Subject: Re: voice-suppression circuits,karaoke
- Message-ID: <1huqkaINNqmq@lily.csv.warwick.ac.uk>
- Date: 31 Dec 92 12:55:38 GMT
- References: <1992Dec23.000104.10686@news.acns.nwu.edu>
- Organization: Computing Services, University of Warwick, UK
- Lines: 35
- NNTP-Posting-Host: lily.csv.warwick.ac.uk
-
- In article <1992Dec23.000104.10686@news.acns.nwu.edu> yuen@casbah.acns.nwu.edu writes:
- >Hi there,
- >
- >I am interested in finding plans, kits or assembled pc to do lead vocal
- >suppression on various source materials (tape, radio, CD etc). Can
- >anyone help provide some hints or clues ?
- >Am also interested in finding out how they work and quality
- >compared to a karaoke machine (e.g. Pioneer) if somebody out there
- >had built one before.
- >I saw the ed in Radio electronics in May but this company already
- >disconnected their business phones.
-
- Vocal eliminators work by subtracting the left and right signals from each
- other. Usually outputting a mono signal, but I have seen one that ouputs a
- mock stereo (mono to left and phase shifted mono to right!) signal. Sounds
- a bit better than mono, but if recorded and played back on MONO equipment
- all the music disappears....(remember, its out of phase with itself)
-
- I will post an ASCII of a cirsuit I use, which is very good when used with
- a CD/Tape source. CD is best, and it varies depending on how the original
- CD/Tape/Record was mixed as to how well it works. It is only a simple circuit
- (3 transistors and a dual opamp) but it works, and it also doesnt clobber
- the bass signal (usually also in the centre) ... hence the opamp (a low pass
- filter)
-
- Keep watching .... when I get it ASCII'd i will post!
-
- =============================================================================
- _/ _/ _/ _/ _/ _/_/_/_/ |
- _/_/ _/_/ _/ _/_/ _/ | Michael Brown
- _/ _/ _/ _/ _/ _/_/ |
- _/ _/ _/ _/_/ _/ | cstadbg@csv.warwick.ac.uk
- _/ _/ _/ _/ _/ _/_/_/_/ _/ | mjb@dcs.warwick.ac.uk
- | csulo@csv.warwick.ac.uk
- =============================================================================
-