Can't Start Jackd with DirectSound on Windows 10

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Can't Start Jackd with DirectSound on Windows 10

jl303
I'm running Jack_v1.9.11_64 on Windows 10 v1903., but I get "Cannot initialize driver".
Any help would be appreciated.
Thanks!

Here's the log.

>jackd.exe -R -S -d portaudio -d "DirectSound::Speakers (Realtek High Definition Audio)"
jackdmp 1.9.11
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
Drivers/internals found in : C:\WINDOWS
Drivers/internals found in : C:\WINDOWS
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
Can't open DirectSound::Speakers (Realtek High Definition Audio), PortAudio will use default input device.
Can't open default PortAudio device
Cannot initialize driver
JackServer::Open failed with -1
Failed to open server

Here's my list:
>jackd -d portaudio -l
jackdmp 1.9.11
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2016 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
Drivers/internals found in : C:\WINDOWS
Drivers/internals found in : C:\WINDOWS
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
********************** Devices list, 7 detected **********************
-------- device #0 ------------------------------------------------
Name                        = MME::Microsoft Sound Mapper - Output
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #1 ------------------------------------------------
[ Default Output ]
Name                        = MME::Speakers (Realtek High Definiti
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #2 ------------------------------------------------
Name                        = MME::Realtek Digital Output (Realtek
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #3 ------------------------------------------------
[ Default Windows DirectSound Output ]
Name                        = DirectSound::Primary Sound Driver
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #4 ------------------------------------------------
Name                        = DirectSound::Speakers (Realtek High Definition Audio)
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #5 ------------------------------------------------
Name                        = DirectSound::Realtek Digital Output (Realtek High Definition Audio)
Max inputs                  = 0
Max outputs                 = 2
Default sample rate         = 44100.00
-------- device #6 ------------------------------------------------
[ Default ASIO Input ]
[ Default ASIO Output ]
Name                        = ASIO::ASIO4ALL v2
Max inputs                  = 2
Max outputs                 = 8
ASIO minimum buffer size    = 64
ASIO maximum buffer size    = 2048
ASIO preferred buffer size  = 512
ASIO buffer granularity     = 8
Default sample rate         = 44100.00
**************************** End of list ****************************
Cannot initialize driver
JackServer::Open failed with -1
Failed to open server