Yes, and perhaps samplehold object with an osc/phasor in input for sample rate reduction.
For muted and inverted bits, I wrote an object last night.
I have a complete patch with bit depth reduction, sample rate reduction, muted bits and inverted bits, and 3 filters.
But my patch does not sound like the video...Blame my bitwises manipulations or filters ?
I post my patch tonight if I have time.
sounds excellent, have you considered posting the subpatch in the community library?
Yes, but actually it's a draft. I would like to have your opinion before.
I have some patches for the community library, ..., but I have to write documentation before posting, ... if I have time.
My draft... I'm not satisfied with the result. I can't understand why the sound is so different from the video. An idea ?
biscuitage.axo (827 Bytes)
GaoQuantize.axo (1.4 KB)
biscuitage.axh (15.0 KB)
Yes, but after finding my problem !
First, I apply bitwise operation on signed signal... I think it's not a good idea.
I must apply an offset in order to obtain a unsigned signal, apply bitwise operation, then apply an opposite offset to obtain signed signal.
But I must be careful when applying offsets, in order to avoid DC offset... (all bits muted, not produce à 0 signal after applying the last offset).
Work in progress...
DC offset is corrected !
Here new patchs, not a OTO biscuit emulation but a patch with sample rate reduction and bitwise operations.
biscuitage.axo (859 Bytes)
biscuitage_demo.axp (7.4 KB)
biscuitage_demo2.axp (6.3 KB)
Oops, some bugs and noises on biscuitage.axo.
Here a new version : one object for muted bits and another one for reversed bits.
biscuitage_m.axo (1.1 KB)
biscuitage_m.axh (5.5 KB)
biscuitage_r.axo (1.1 KB)
biscuitage_r.axh (5.5 KB)
BitCrusher.axp (4.0 KB)
BitCrusher.axp is the patch used for audio example.
With this object it's possible to clone a part of OTO Biscuit.
Note : Objects control signal input, for change bits depth or sample rate with lfo, envelope, etc.
digging this so far, using it in a new patch and controlling the muted/inversed bits with an envelope, pretty interesting results!
Yes, it's planned ! I have to explain how objects work before.
Thank you for your answer.
Could you not just copy the sign bit before applying bitwise operations, then replace the sign bit as it was?
There's a useful post in this thread
showing how to do various operations on individual bits. I'm not sure if the sign bit is at position 0 or 31 (should be easy enough to find out though).
Just a thought.
a|x
Be careful, the most significant bit (position 31) is the sign bit, but if it's set (negative), it extends...
!!! ??
decimal -1 is binary 1111111111111111
decimal 0 is binary 0000000000000000
decimal 1 is binary 0000000000000001This is "two's complement", and is used (nearly) everywhere to represent negative integers.
Ah, so bitwise operations would operate differently on the positive and negative halves of the waveform.
Will have to have another few read-throughs of that linked page. Not getting it, at the moment..
a|x
Just got my Axoloti and a bitcrusher was the first use I thought to patch up.
Seeing the quantize object couldn't be adjusted in real time I've patched 12 instances via a couple of mux's to give 1 to 12 bit depth. Also added a crossfade to blend between the original signal and bitcrushed version.
Waiting on some stereo splitters before I can use it as an effect, so the patch has a sine generator as source for now.
The patch could be tidier with a 12 input mux. Not been able to get that working yet. I get an error possibly down to [buffer_index] being lower than the number of inlets I've made.
Got my stereo splitters so I've been testing this out as an insert effect.
I've found using the usb power gives major noise issues once you go below 8 bit. Using the dc power jack this is solved,only issue I've found is a kind of "ghost note" sounds once there is no audio at the input. Bit like a 1 second delay but only applies to the last sound. Again this only appears below 8 bit.
Using the logic/decode/bin 8 object routed to 4 leds to give a display of the bit depth in binary is a nice addition.
I'm getting phasing artifacts when using the crossfade between dry and processed signal. Going to try and reduce this by introducing a delay to the dry signal.
