Any plans to document how to do this for us "paint by numbers" DIY folks ?
That alone would be worth buying one.
I certainly can do that but for the time being you can check out this thread for various mods for the Fab Echo.
http://www.diystompboxes.com/smfforum/index.php?topic=64519.0To use the TapTation all you would need to do to the Fab Echo is find a 5V connection, ground, and instead of the delay time pot on pin 6 wiring the TapTation in and your done.
I have tried to give as much information as I thought needed in the two app notes posted including a note for the pt2399 interface.
Can I otherwise mod the Echo Base I haven't built yet to incorporate a "Taptastic Mode" switch to get dotted eighths without the hassle? Might have a look at that in the near future...
I have not looked at the Echo Base but I would think you should be able to. All the TapTation circuit needs from the delay circuit is the power (5V), ground, and the connection to the time pin on the PT2399 (Pin 6). The rest of the circuit can remain the same.
This is really great! I have a Fab Echo that i don't use anymore, so I'd really like to see some notes on how to combine this new tap tempo control with the Fab Echo guts. Will it matter that I've already modified the fab for adjustable delay time, infinite repeats, and max wet signal? I'd obviously rehouse the thing, so I'm assuming that I'd need to figure out how to wire in a more sturdy replacement momentary switch for the fab's little tactile bypass switch....
As mentioned above all you need is the power lines and pin 6 of the PT2399 and your good to go. All the audio remains untouched so the infinite repeat and max wet signal mods do not affect anything or need to be touched. The TapTation will replace the delay time pot but you can reuse the pot if its linear in the TapTation circuit for the delay time control.
In that Fab Echo modding thread I include a mod to force the echo to be on all the time so you can then drop a 3PDT switch in for true bypass. You can get both the TapTation and 3PDT from Aron and while your at it grab a second 3PDT switch for the tap tempo switch.
I did use a bunch of Fab Echos as the test platforms for the TapTation.
From a purely consumer point of view (rather than a DIY one), this seems to have more features than the PTAP. Do you know enough about the PTAP that you could compare and contrast what your product does against the PTAP? Features, limitations, which does one thing better than the other, etc.
I took a quick look over the PTAP. I'm going to compare to the large version of the PTAP to TapTation. There are some pros and cons for each as they have slightly different implementations.
The PTAP uses a 50K pot for a max around 600ms. The TapTation uses a 100K pot for a max around 1125ms, of course longer times will result in some fidelity loss but some may like that for its "analog-ness"
The PTAP has four time divisions: quarter, eighth, dotted eight, triplet eighth. The TapTation has five time divisions: quarter, eighth, dotted eight, sixteenth, dotted sixteenth.
The PTAP uses the delay pot to select the time division. The TapTation uses switch(es) to select the time division.
The PTAP has a single tempo output. The TapTation has two outputs one for the time entered and one with the time division applied. This allows you to see the time you entered and what the delay time is with the division. Also you can sync other logic circuits with either outputs.
The PTAP has a switching schem for switching between the manual and tap modes using the footswitch. The TapTation overrides the delay pot when a tempo is tapped in. To go back into manual mode you turn the delay pot more then 5% from the setting when the tap tempo took over. This is similar behaviour to most commercial tap tempo delays.
Its not clear if the PTAP can average multiple taps or it just uses the last two taps. The TapTation will accept two or more taps and average up to the last four taps.
Its not clear when the PTAP applies the new tempo. The TapTation applies the new tempo about one second after the last tap is entered. This prevents weird delay pitch shifting while entering multiple taps.
The PTAP has a built in switch debouncing. The TapTation debouncing is external. The reason for this is it allows the builder to decided the level / type of debouncing which can be as simple as a R/C network as in the datasheets and app notes. It also allows the TapTation to be interfaced to other logic circuits without having the debouncing interfering.
The PTAP does not have a modulation output. The TapTation has a modulation output with a period width selection feature so that you can modulate the delays using a BS170 MOSFET and use the period width control to act like the chorus / vibrato switch on the DMM. The modulation follows the tempo time with division applied. This output can also be used as a LFO for other circuits like phasers and tremolos.
The PTAP has a calibration mode. The TapTation does not.
The PTAP only accepts a momentary switch. The TapTation accepts either momentary or toggle switches like the 3PDT switches Aron sell so you can order those switches with the TapTation kit instead of having to source momentary switches else where.
The PTAP costs $16.50 with a PCB availible. The TapTation costs $20 with no PCB availible...for now.
I should also mention that all profits from the TapTation goes to Aron for this forum. Its my way of supporting the forum.
Andrew
