famish99/diretta_synchro_sync_install.md

## diretta_synchro_sync_install.md

      
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              diretta_synchro_sync_install.md
            
          
    Diretta Synchro Sync Host Install Instructions

Prerequisites


Ubuntu Desktop/Server 22.04 LTS or 24.04 LTS
Install the following packages using apt:
$ sudo apt install alsa-utils build-essential dkms


Download and unzip Diretta Host driver package


Download ALSA driver version 0.147.1 from Diretta Preview
Unzip the drivers using the following command:
$ tar -xvf DirettaAlsaHost_0_147_01.tar.xz


Setup DKMS


cd DirettaAlsaHost/
Test for build issues with your kernel by running:
$ make KERNELDIR=/lib/modules/$(uname -r)/build


Note
If you're on a kernel older than 6.4.0, you'll likely run across 2 build issues that can be fixed by uncommenting (removing the //) from the lines in alsa_bridge.c that look like:
#if LINUX_VERSION_CODE < KERNEL_VERSION(6,3,0)
   vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
#else
   vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
#endif
and
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 4, 0)
    diretta_alsa.class = class_create(THIS_MODULE, "diretta-alsa");
#else
    diretta_alsa.class = class_create("diretta-alsa");
#endif


Clean up test build using:
$ make clean


Run touch dkms.conf and add the following content:
MAKE="'make' KERNELDIR=/lib/modules/${kernelver}/build"
CLEAN="'make' clean"
BUILT_MODULE_NAME=alsa_bridge
BUILT_MODULE_LOCATION=./
DEST_MODULE_LOCATION=/kernel/drivers/alsa/
PACKAGE_NAME=alsa_bridge
PACKAGE_VERSION=0.147.1
REMAKE_INITRD=yes
AUTOINSTALL=yes


Copy the directory into /usr/src for DKMS to find it
$ sudo cp -R . /usr/src/alsa_bridge-0.147.1


Run the following commands to enable DKMS for the module:
$ sudo dkms add -m alsa_bridge -v 0.147.1
$ sudo dkms build -m alsa_bridge -v 0.147.1
$ sudo dkms install -m alsa_bridge -v 0.147.1


Load the alsa_bridge module:
$ sudo modprobe alsa_bridge


Add alsa_bridge to /etc/modules so the module will load on boot
$ echo "alsa_bridge" | sudo tee -a /etc/modules


Diretta Host Service setup

Note
When upgrading from a previous version, you will have to disable it by running the following:
$ sudo systemctl stop diretta_sync_host
$ sudo systemctl disable diretta_sync_host


Check your version of gcc using the following command:
$ gcc --version


Note
Depending on the age of your CPU, the v3 and v4 versions of the syncAlsa may give you the following error: Illegal instruction


Edit /usr/src/alsa_bridge-0.147.1/diretta_sync_host.service to the following:
[Unit]
Description = Diretta Synchro Alsa Host
After=network-online.target
ConditionPathExists=/usr/src/alsa_bridge-0.147.1

[Service]
ExecStart=/usr/src/alsa_bridge-0.147.1/syncAlsa_gcc15_x64_v4
ExecStop=/usr/src/alsa_bridge-0.147.1/syncAlsa_gcc15_x64_v4 kill
Restart=always
Type=simple

[Install]
WantedBy=multi-user.target


Mark the selected service as executable
$ sudo chmod +x /usr/src/alsa_bridge-0.147.1/syncAlsa_gcc15_x64_v4


Run the following steps to run syncAlsa on boot
$ sudo ln -s /usr/src/alsa_bridge-0.147.1/diretta_sync_host.service /etc/systemd/system/
$ sudo systemctl enable diretta_sync_host
$ sudo systemctl start diretta_sync_host


To check if ALSA drivers are working correctly, make sure an audio device is connected to the target and run:
$ sudo aplay -l


Tip
If you want to edit your /usr/src/alsa_bridge-0.147.1/syncalsa_setting.inf to unlock additional performance, try the following settings:
Interface=
TargetProfileLimitTime=200
ThredMode=1
InfoCycle=100000
FlexCycle=disable
CycleTime=800
CycleMinTime=10
Debug=disable
periodMax=32
periodMin=12
periodSizeMax=38400
periodSizeMin=960
syncBufferCount=8
alsaUnderrun=enable
CpuSend=
CpuOther=
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