I didn't open the patch, but you don't want to multiply audio using message-rate ramp (from regular [line])
use [line~] instead
edit: I noticed you're also setting a [*~ ] from a [/ 2] (from the [snapshot~]) every 50 ms. That's probably also doing some popping. Maybe a [line~] over 50 ms instead would be appropriate? not exactly sure of the intent there

this will also be a feature for [poly] in the next pd release https://github.com/pure-data/pure-data/pull/661

@bas-m you can move them around in edit mode. Select the leftmost part of the line with a click-an-drag. it is a canvas with a label (right-click the selection box and you can change the label from the properties)

are you using [noteout]? that seems like it should work

What is the software you're sending to and how are you inspecting the received bytes on that end?

@gentleclockdivider of course, you can look at the code.

static void pack_anything(t_pack *x, t_symbol *s, int ac, t_atom *av)
{
    t_atom *av2 = (t_atom *)alloca((ac + 1) * sizeof(t_atom));
    int i;
    for (i = 0; i < ac; i++)
        av2[i + 1] = av[i];
    SETSYMBOL(av2, s);
    obj_list(&x->x_obj, 0, ac + 1, av2);
}

you have to get into a few functions, but basically the argument 's' is the 'selector' (in this case '-' or 'X'), 'ac' is the count of items in the list (after the selector) and *av is the pointer to the atoms that make it up.

first, it allocates a new list of atoms of length of the input elements (elements after the selector, in this case 0) + 1 = 1

then it shifts all the input elements up by 1, and inserts the selector as a symbol in the first element
Then obj_list will distribute all the elements of that list to the inlets of pack, from right to left which will set the atoms that pack is storing for those inlets
when obj_list lastly reaches/distributes to the leftmost it will call pack_symbol, which will call pack_bang which triggers the atoms pack has stored to be output as another new list

binding pack_anything to anythings coming into the first inlet is done by calling class_addanything in pack_setup method

the '-' and 'X' are 'anything's in terms of pd types

the cold inlets are generic and expect symbols, not 'anything's. That's why you have to convert them to symbols with [symbol].

However, the 'hot' (leftmost) inlet does accept 'anything's, and converts them to symbols

you can use the 'find externals' Help menu item to find missing externals.
When I look for 'xfm~' using this it brings up the 'creb' library. Doing so with 'sgn~' brings up zexy
edit: you can also use the deken website: https://deken.puredata.info/

it isn't finding the libtcl library. Where is it installed?
Anyways, are you sure they weren't written for 043-4-Extended rather than vanilla? Any old patch than ran on old PD vanilla should at least run in current PD
Maybe instead of recompiling pd you could post those incompatibilities.

internally pd uses a table for the [cos~] and [osc~] objects that is only 512 points with linear interpolation.
if you want to be more accurate you can make your own tables with [cos] object, or if you want to use the math.h functions directly at audio rate I think [expr~ sin($v1)] (or cos) does that

@jameslo said:

It looks like the second ramp (jump in this case) is still timed relative to halfway through the block though.

yes that one doesn't have negative delay and the first message cleared the queue already so that one gets processed normally
edit: it isn't relative to the start of the block, but if you're trying to sync with block-synced objects that would be an issue regardless