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The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

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  #11  
Old 05-19-2014, 09:53 PM
zowno zowno is offline
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Okay, so the doubling would be permanent. The tape machine has a 3 3/4ips and 7 1/2ips switch already so by doubling the speed I'd still have the 7 1/2 but I'd also have 15ips.

It will be a tape loop system, but these are the specs that the original machine used and I know it's not impossible. To use and LFO instead of a manual knob seems totally within the realm of modern electronics.

Flutter is indeed the goal and any random flutter will be welcome. The unit will have a "dry" through signal that will remain unaffected to be blended with the effected signal.

In the case of audio and specifically, music technology you will struggle to find someone who will think digital is better than analogue. You need look no further than Daft Punk's latest album to understand that. But this is not a place for such arguments. This is more a building exercise to design something interesting rather than perfect.
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  #12  
Old 05-19-2014, 10:25 PM
wayneh wayneh is offline
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Originally Posted by zowno View Post
...you will struggle to find someone who will think digital is better than analogue.
That depends on what "better" means.
The market has spoken, and digital wins. This from a bluegrass fan.
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  #13  
Old 05-21-2014, 12:53 AM
zowno zowno is offline
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Tape flutter would actually be a nice quirk. It wouldn't be anything that wouldn't add to the effect.

Currently the machine runs at 7 1/2 IPS. I would want the double in speed to be permanent. I could later use a servo system to move the playback head, but for now nailing the effect is more important.

You think that I should replace the original motor?

What is the likely hood of being able to implement an LFO to vary the speed?
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  #14  
Old 05-21-2014, 02:41 AM
wayneh wayneh is offline
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You think that I should replace the original motor?
Are you certain that the motor directly drives the tape? Sometimes there are pulleys and belts. Maybe you could just change a pulley?
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  #15  
Old 05-21-2014, 11:22 AM
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Alec_t Alec_t is offline
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Quote:
You think that I should replace the original motor?
We don't know what motor/drive system you have. I was guessing 'domestic tape recorder = small induction motor driving capstan/flywheel via stepped pulley system'. Is yours different?
Wayneh's suggestion offers one possible solution; otherwise you would have to double the motor speed by doubling its drive frequency (which the motor might not like).
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