PowerShell script to update Adobe Audition's MachineSpecificSettings.xml to use the specific input and output devices

fix-audition-devices.ps1

# Update MachineSpecificSettings when Windows does to change the UID for the audio hardware
# To use Get-AudioDevice, install AudioDeviceCmdlets
# Install-Module -Name AudioDeviceCmdlets
# See https://github.com/frgnca/AudioDeviceCmdlets
#
# I used https://jsonlint.com/ for verifying the embedded JSON that Adobe uses

# get the latest version of Audition installed
$version = (gci ([IO.Path]::Combine( $env:APPDATA, "Adobe\Audition")) | sort-object Name -Descending | Select-Object -First 1).Name

# build the path to the machine setting file
$AuditionSettings = ([IO.Path]::Combine( $env:APPDATA, "Adobe\Audition\"+$version+"\MachineSpecificSettings.xml"))

# read the settings
$xml=[xml](Get-Content $AuditionSettings)

# get the node that stores the audio device settings
# xpath is crazy.  I cheated and pasted the settings into https://xmltoolbox.appspot.com/xpath_generator.html
$node = $xml.SelectSingleNode("//Section[@label='Root']/Section[@label='Prefs']/Section[@label='AudioDevice']/KeyVal[@Key='abe.io.audio.settings']")

# The audio device settings are serialized into a compressed JSON string and stored as the node content
$jdataString = $node.'#text'

# deserialize the json to an object
$jdata = ($jdataString | ConvertFrom-Json)

# the devices to use.
# These are mine, pick your own
$microphoneName = "Microphone (Rode Podcaster)"
$outputdevicename = "Syba (USB Advanced Audio Device)"

# get a list of all of the audio devices
$devices = Get-AudioDevice -List

# walk through that list to get UID of the devices
foreach($device in $devices)
{
    if ($device.Name -eq $microphoneName)
    {
        # Adobe only uses a subset of the ID returned here
        $uid = $device.ID.SubString(18, 36)
    }
    if ($device.Name -eq $outputdevicename)
    {
        $outputuid = $device.ID.SubString(18, 36)
    }
}

# now walk the Audition's hardware settings until we find the MME setting
foreach($j in $jdata.'abe.io.audio.classes')
{
    # It's JSON and each item in the collection has different members
    # So we check to make sure that we have the right item
    if ($null -ne $j."abe.io.audio.mme.inputdevicename")
    {
        # if the input uid has changed, then update the device object
        if ($j."abe.io.audio.mme.inputdeviceuid" -ne $uid)
        {
            $j."abe.io.audio.mme.inputdevicename" = $microphoneName
            $j."abe.io.audio.mme.inputdeviceuid" = $uid
        }
    }
    if ($null -ne $j."abe.io.audio.mme.outputdevicename")
    {
        # if the output uid has changed, then update the device object
        if ($j."abe.io.audio.mme.outputdeviceuid" -ne $outputuid)
        {
            $j."abe.io.audio.mme.outputdevicename" = $outputdevicename
            $j."abe.io.audio.mme.outputdeviceuid" = $outputuid
        }
    }
}

# serialize the object back to a single line string
$updatedData = ($jdata | convertto-json -Depth 5 -Compress)

# if it's changed, then update the node and save the file
if ($jdataString -ne $updatedData)
{
    $node.'#text' = $updatedData

    write-host "Updated settings"

    $xml.Save($AuditionSettings)
}