A quick update to the CV Monitor Tool.
presiato posted an improvement that allows the four Rotary inputs to be used for bipolar CV signals, rather than the unpleasant truncation that occurred in version 0.0.3.
His original post is here (if you have access to the forum). Many thanks for the improvement!
I have posted the improved CV Monitor Combi patch here:
CV Monitor Tool 0.0.4
Note that the display range is set from 1 to 2000 - this is because a direct mapping between a bipolar CV value and the DDL numeric display does not seem possible. You can get pretty close, but it's often out by 1 or 2. To ensure that this inaccuracy does not confuse anyone, I deliberately extended the range to approximately 1000 in either direction. Feel free to consider this +/- 100.0% if you like. Note that the mid-point is now 992 (for a CV value of zero). I realise this isn't ideal, but it's due to inaccuracies generated by rounding within Reason.
If you can improve it, please let me know!
Showing posts with label Tools. Show all posts
Showing posts with label Tools. Show all posts
Monday, April 27, 2009
Friday, March 6, 2009
CV Monitor Tool
In the course of developing my Noise Gate, I found it very useful to visualise CV signals in real time. In fact, it surprises me that there isn't a built-in way to do this. So I thought I'd share my very simple "CV Monitor" combinator.
Figure 1 - The CV Monitor
Figure 2 - Connect CV signals to indicated ports
It's a very straightforward device to use - simply connect any CV signal you're interested in to one of the ports on the back of the Combi, as figure 3 demonstrates with the SubTractor's LFO output.
Figure 3 - SubTractor LFO connected to Pitch Bend CV input
Turn the rack around and you'll see one or more of the DDL digital displays changing in real time according to the incoming CV signal. Because the DDL delay starts at one, not zero, I have centred the displays at 1000. So just ignore the leading 1 and read the CV value directly.
Note that the rotary and modulator monitors are restricted to unipolar CV signals from 0 to 127. If you want to view a bipolar signal (such as the sinewave from the Malström LFOs) then you'll want to connect this to the Pitch Bend input. This will display the CV signal from 1 to 2000 for full-range deflection of the Pitch Bend wheel.
This hints at something to be aware of. Reason seems to do CV scaling where necessary, so thinking in terms of absolute CV values can be dangerous at times. For example, if you connect the SubTractor triangle-wave LFO to the Pitch Bend input, you'll see full deflection of the Pitch Bend and therefore the DDL will display a signal oscillating between 1 to 2000. But if you connect the same signal to, say, Rotary 1, then two things happen:
I'll think about this some more - if this is true then it might make far more sense for the rotaries to map from 1000 to 1100 instead.
Also note that the Pitch Bend wheel generates CV values from -8192 to 8191, a range that exceeds the display capability of the DDL delay. The Combi programming scales this range down to 1-2000 for display.
The Combi also accepts and displays Aftertouch and Expression MIDI signals, in case that's useful.
Here is the Combinator Patch.
RNS Example 1 has a bunch of CV automations driving the Combi controls directly. Hit 'play' to view.
RNS Example 2 has several LFOs being monitored simulataneously by the device. Note that the SubTractor LFOs are all bipolar, so you'll see the display stick at 1000 for those parts of the waveform that are below half-way.
I hope you find this useful at some stage.
Figure 1 - The CV Monitor
Figure 2 - Connect CV signals to indicated ports
It's a very straightforward device to use - simply connect any CV signal you're interested in to one of the ports on the back of the Combi, as figure 3 demonstrates with the SubTractor's LFO output.
Figure 3 - SubTractor LFO connected to Pitch Bend CV input
Turn the rack around and you'll see one or more of the DDL digital displays changing in real time according to the incoming CV signal. Because the DDL delay starts at one, not zero, I have centred the displays at 1000. So just ignore the leading 1 and read the CV value directly.
Note that the rotary and modulator monitors are restricted to unipolar CV signals from 0 to 127. If you want to view a bipolar signal (such as the sinewave from the Malström LFOs) then you'll want to connect this to the Pitch Bend input. This will display the CV signal from 1 to 2000 for full-range deflection of the Pitch Bend wheel.
This hints at something to be aware of. Reason seems to do CV scaling where necessary, so thinking in terms of absolute CV values can be dangerous at times. For example, if you connect the SubTractor triangle-wave LFO to the Pitch Bend input, you'll see full deflection of the Pitch Bend and therefore the DDL will display a signal oscillating between 1 to 2000. But if you connect the same signal to, say, Rotary 1, then two things happen:
- the signal is truncated for negative values, so the DDL will show 1000 for those parts of the LFO waveform.
- the signal is scaled so that the maximum CV value maps to the full range of the control being modulated, in this case 127.
I'll think about this some more - if this is true then it might make far more sense for the rotaries to map from 1000 to 1100 instead.
Also note that the Pitch Bend wheel generates CV values from -8192 to 8191, a range that exceeds the display capability of the DDL delay. The Combi programming scales this range down to 1-2000 for display.
The Combi also accepts and displays Aftertouch and Expression MIDI signals, in case that's useful.
Here is the Combinator Patch.
RNS Example 1 has a bunch of CV automations driving the Combi controls directly. Hit 'play' to view.
RNS Example 2 has several LFOs being monitored simulataneously by the device. Note that the SubTractor LFOs are all bipolar, so you'll see the display stick at 1000 for those parts of the waveform that are below half-way.
I hope you find this useful at some stage.
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