DATASSETTE RECORD IN MOD

[Desperado]

Hi everyone, I know that it is possible to solder a jack on the Datassette recorder board. In this way it would be possible to record games from a PC or smartphone, directly on cassette. I looked for a while on the net but there is a lot of confusion and I didn't quite understand where to solder the two wires of the jack ... Can anyone help me please? Thanks!

 

[daver2]

By datasette do you mean the Commodore unit?

If so, I don't think you can...

If it is not a Commodore unit (e.g. a standard cassette deck) then you will have to specify exactly what manufacturer, make and model.

Dave

 

[Desperado]

By datasette do you mean the Commodore unit?

If so, I don't think you can...

If it is not a Commodore unit (e.g. a standard cassette deck) then you will have to specify exactly what manufacturer, make and model.

Dave

Yes Dave, Commodore Datassette.... I read in this forum that it's possible:

Unlock Your Datasette

Unlock Your Datasette

load64.com

 

[daver2]

Ah, I see what they are doing now.

So, the $64k question is "do you have exactly the same part number for the datasette they mention"?

Dave

 

[Desperado]

Ah, I see what they are doing now.

So, the $64k question is "do you have exactly the same part number for the datasette they mention"?

Dave

Yes i welded the two jack s'wires in the points indicated but when I try to load a game from my smartphone and record on cassette, I try to load from cassette without success

 

[krebizfan]

https://www.rift.dk/modifying-a-datassette-for-audio-in/ suggests the need to filter the signal. Unfortunately, the blog post that is referred to with more detailed diagrams is gone.

 

[daver2]

There are three different pictures shown with three different wirings for three different reasons.

So which one did you implement?

Dave

 

[Desperado]

There are three different pictures shown with three different wirings for three different reasons.

So which one did you implement?

Dave

The last, "Line in for recording"

 

[Desperado]

https://www.rift.dk/modifying-a-datassette-for-audio-in/ suggests the need to filter the signal. Unfortunately, the blog post that is referred to with more detailed diagrams is gone.

Also I am trying to use the Tapdancer app but without success..

 

[daver2]

So can you post a photograph of where you have connected the wires to the datassette. Your original post indicated that you were confused about where to connect the wires to.

They also state about connecting to an old fashioned output (speaker). A modern smartphone may not have sufficient drive.

Dave

 

[Desperado]

They also state about connecting to an old fashioned output (speaker). A modern smartphone may not have sufficient drive.

I have seen some videos on the net where it works without any problems with the smartphone ...

 

[Desperado]

I welded in this Way:

 

[daver2]

That looks correct to me.

I assume you have connected the yellow wire to the outer sleeve of the jack and the blue wire to the tip of the jack?

Dave

 

[Desperado]

That looks correct to me.

I assume you have connected the yellow wire to the outer sleeve of the jack and the blue wire to the tip of the jack?

Dave

Yes exactly!

 

[daver2]

I presume then you have played a waveform out of your PC and recorded onto the datasette cassette, yes?

Have you tried to listen to the resulting cassette recording on a normal cassette player?

I assume your jack plug to your PC has three 'pins'? A tip, a ring and a sleeve. I assume the ring is not connected?

The tip is the left hand channel with the ring the right hand channel. By wiring up the tip and sleeve (not the ring) only the left hand channel is used.

Dave

 

[Desperado]

I presume then you have played a waveform out of your PC and recorded onto the datasette cassette, yes?

Not....i have smartphone with Tapdancer app...

Have you tried to listen to the resulting cassette recording on a normal cassette player?

Unfortunately i don't have this now

 

[Desperado]

I assume your jack plug to your PC has three 'pins'? A tip, a ring and a sleeve. I assume the ring is not connected?

I have this:

 

[daver2]

Yes, that is a TRS (tip, ring sleeve) jack plug.

A smartphone and an app, same thing in my book...

So, how do you know if you have recorded anything?

What you can do is to play the output from your smartphone/app with your oscilloscope connected - with the screen of the probe to the yellow wire and tip of the probe to the blue wire - and see what output voltage you see (whilst recording onto tape).

If you play the tape back - with the screen of the oscilloscope probe to the yellow wire and the tip of the oscilloscope probe connected to the point indicated in the photograph for the LINE OUT (first photograph). You don't require any components for this. See if you see anything on the oscilloscope when you are playing the cassette.

Dave

 

[Desperado]

Yes, that is a TRS (tip, ring sleeve) jack plug.

A smartphone and an app, same thing in my book...

So, how do you know if you have recorded anything?

What you can do is to play the output from your smartphone/app with your oscilloscope connected - with the screen of the probe to the yellow wire and tip of the probe to the blue wire - and see what output voltage you see (whilst recording onto tape).

If you play the tape back - with the screen of the oscilloscope probe to the yellow wire and the tip of the oscilloscope probe connected to the point indicated in the photograph for the LINE OUT (first photograph). You don't require any components for this. See if you see anything on the oscilloscope when you are playing the cassette.

Dave

Hi Dave,
if i connect scope probe on smarphone output when i load a game from tapdancer, i see a good waveform but if i connect when i play cassette, i see only some noise signal

 

[daver2]

Where are you connecting your scope probe to when you are playing the cassette?

Dave