[sdiy] Automatic Double Tracking/ slapback device

[Theo]

From: danial stocks <diode at hotmail.com>

>
> >Howdy, everyone,
> >     I was wondering how difficult it would be to modify a tape recorder
to
> >record an input signal directly before playing it back along with the
> >original signal but slightly delayed to produce that Beatles double
> >tracking
> >effect?
> you could install extra tape head on the other side of the cassette like
the
> erase head is  but on the other side - so then you have
> erase-record-playback
>

Too bad this place is already taken by the capstan and the drive wheel.

What you are after is a deck with tape-monitor setting (as opposite to
source-monitor setting).
This is a common feature among the better cassette decks.
These decks do their trick by using a "double" head,
one housing with separate record and playback heads.
You can buy a replacement "double" head for about $20 and fit it a common
deck.

Hope this helps,
Theo