I followed this tutorial: https://steamcommunity.com/app/410340/discussions/3/3211505894113757828/
First of all, I was unable to find portaudio19-dev, but there were already portaudio 1:19.6.0-6 and lib32-portaudio 1:19.6.0-4 installed. Here is a screenshot of what is available in repos.

module make was successful
[olive@olive-videoproject module]$ make
make -C /lib/modules/5.6.8-1-MANJARO/build M=/home/olive/Downloads/txppm-master/module modules
make[1]: Entering directory '/usr/lib/modules/5.6.8-1-MANJARO/build'
CC [M] /home/olive/Downloads/txppm-master/module/tx.o
MODPOST 1 modules
CC [M] /home/olive/Downloads/txppm-master/module/tx.mod.o
LD [M] /home/olive/Downloads/txppm-master/module/tx.ko
make[1]: Leaving directory '/usr/lib/modules/5.6.8-1-MANJARO/build'
however, sudo make install had some issues
[olive@olive-videoproject module]$ sudo make install
[sudo] password for olive:
make -C /lib/modules/5.6.8-1-MANJARO/build M=/home/olive/Downloads/txppm-master/module modules_install
make[1]: Entering directory '/usr/lib/modules/5.6.8-1-MANJARO/build'
INSTALL /home/olive/Downloads/txppm-master/module/tx.ko
At main.c:160:
- SSL error:02001002:system library:fopen:No such file or directory: crypto/bio/bss_file.c:69
- SSL error:2006D080:BIO routines:BIO_new_file:no such file: crypto/bio/bss_file.c:76
sign-file: certs/signing_key.pem: No such file or directory
DEPMOD 5.6.8-1-MANJARO
make[1]: Leaving directory '/usr/lib/modules/5.6.8-1-MANJARO/build'
depmod
install 100-txppm.rules /etc/udev/rules.d/
software make was also successful
[olive@olive-videoproject software]$ make
cc -O2 -c -oppm.o ppm.c
cc -O2 -c -osys.o sys.c
cc -O2 -c -otui.o tui.c
cc -o ppm2tx ppm.o sys.o tui.o -lpthread -lportaudio -lm -lasound -O2
and make install
[olive@olive-videoproject software]$ sudo make install
[sudo] password for olive:
install ppm2tx /usr/local/bin/
mkdir -p /usr/local/share/txppm
install logo.png /usr/local/share/txppm/
install ../LICENSE /usr/local/share/txppm/
install icon.png /usr/share/pixmaps/
install txppm.desktop /usr/share/applications/
starting ppm2tx seems can't find compatible device
[olive@olive-videoproject software]$ ppm2tx
TXPPM - ppm2tx v.0.3.8 by Jürgen Diez
This program comes with ABSOLUTELY NO WARRANTY; for details see the LICENSE shipped with this software.
This is free software, and you are welcome to redistribute it under certain conditions; check the LICENSE file shipped with this software for details.Syntax: ppm2tx <deviceid> <mixing>
List of available devices:
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
connect(2) call to /dev/shm/jack-1000/default/jack_0 failed (err=No such file or directory)
attempt to connect to server failed
DeviceID (0) name: HDA Intel PCH: ALC662 rev3 Analog (hw:0,0).
DeviceID (7) name: sysdefault.
DeviceID (15) name: samplerate.
DeviceID (16) name: speexrate.
DeviceID (17) name: pulse.
DeviceID (18) name: speex.
DeviceID (19) name: upmix.
DeviceID (20) name: vdownmix.
DeviceID (22) name: default.
sudo dmesg | tail does not have twoo needed lines
[ 3442.005651] input: PPM Transmitter as /devices/virtual/input/input15
[ 3442.005742] tx: device /dev/tx created (major: 222 minor: 0)
[olive@olive-videoproject ~]$ sudo dmesg | tail
[11340.173639] audit: type=1106 audit(1589294414.221:157): pid=40134 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11340.173641] audit: type=1104 audit(1589294414.221:158): pid=40134 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11377.435311] audit: type=1101 audit(1589294451.485:159): pid=40193 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="olive" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11377.435522] audit: type=1110 audit(1589294451.485:160): pid=40193 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_unix,pam_permit,pam_env acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11377.437655] audit: type=1105 audit(1589294451.488:161): pid=40193 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11377.444345] audit: type=1106 audit(1589294451.495:162): pid=40193 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11377.444413] audit: type=1104 audit(1589294451.495:163): pid=40193 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_unix,pam_permit,pam_env acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11445.071706] audit: type=1101 audit(1589294519.119:164): pid=40291 uid=1000 auid=1000 ses=1 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="olive" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11445.071870] audit: type=1110 audit(1589294519.119:165): pid=40291 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:setcred grantors=pam_unix,pam_permit,pam_env acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[11445.074327] audit: type=1105 audit(1589294519.122:166): pid=40291 uid=0 auid=1000 ses=1 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
I followed this tutorial: https://steamcommunity.com/app/410340/discussions/3/3211505894113757828/
First of all, I was unable to find portaudio19-dev, but there were already portaudio 1:19.6.0-6 and lib32-portaudio 1:19.6.0-4 installed. Here is a screenshot of what is available in repos.

module make was successful
however, sudo make install had some issues
software make was also successful
and make install
starting ppm2tx seems can't find compatible device
sudo dmesg | tail does not have twoo needed lines
[ 3442.005651] input: PPM Transmitter as /devices/virtual/input/input15
[ 3442.005742] tx: device /dev/tx created (major: 222 minor: 0)