$ apt-file find /usr/bin/phononsettings
phonon4qt5settings: /usr/bin/phononsettings

amarok 2>&1 Chris\ Rea\ \'And\ You\ My\ Love\'\ by\ Mila\ Gee\ \(HD\).mp3 
**********************************************************************************************
** AMAROK WAS STARTED IN NORMAL MODE. IF YOU WANT TO SEE DEBUGGING INFORMATION, PLEASE USE: **
** amarok --debug                                                                           **
**********************************************************************************************
[0000558a4e898f80] vlcpulse audio output error: PulseAudio server connection failure: Connection refused
[0000558a4e898f80] vlcpulse audio output error: PulseAudio server connection failure: Connection refused
[0000558a4e898f80] main audio output error: no suitable audio output module
QObject::connect: No such signal Phonon::VLC::MediaObject::angleChanged(int)
QObject::connect: No such signal Phonon::VLC::MediaObject::availableAnglesChanged(int)
WARNING: Phonon::createPath: Cannot connect  Phonon::MediaObject ( no objectName ) to  Phonon::AudioDataOutput ( no objectName ).

$ arateconf
...
A - Show all plugins [ ]
M - Plug-ins:
 [X] Convert,  [ ] Expand, [X] Asym
 [ ] Play Vol, [X] Dmix
 [ ] Rec. Vol, [X] Dsnoop
 [ ] Phonon,   [ ] Normalizator

$ cat ~/.asoundrc
# ALSA library configuration file managed by arateconf.
#
# MANUAL CHANGES TO THIS FILE WILL BE OVERWRITTEN!
#
# Manual changes to the ALSA library configuration should be implemented
# by editing the ~/.asoundrc file, not by editing this file.

#=====================================================
# Configuration for system
#-----------------------------------------------------

# Perform dmixer
pcm.dmixer_system
{
	type			dmix
	ipc_key			1024
	ipc_perm		0666

	hint
	{
		show		off
		description	"Direct mixing of multiple audio streams (system)"
	}

	slave
	{
		pcm		"hw:system,0"

		rate		48000
		channels	2
		format		S16_LE

		period_size	1920
		buffer_size	7680
	}
}

# Perform dsnooper
pcm.dsnooper_system
{
	type			dsnoop
	ipc_key			1025
	ipc_perm		0666

	hint
	{
		show		off
		description	"Recording from the same device for several applications simultaneously (system)"
	}

	slave
	{
		pcm		"hw:system,0"

		rate		48000
		format		S16_LE

		period_size	1920
		buffer_size	7680
	}
}

# Perform duplex
pcm.duplex_system
{
	type			asym
	playback.pcm		"dmixer_system"
	capture.pcm		"dsnooper_system"

	hint
	{
		show		off
		description	"Full duplex for simultaneous playback and recording (system)"
	}
}

# Perform convert
pcm.convert_system
{
	type			rate
	converter		fftrate

	hint
	{
		show		off
		description	"Sample rate converter (system)"
	}

	slave
	{
		pcm	"duplex_system"
		rate	48000
		format	S16_LE
	}
}

# Perform plug device
pcm.primary_system
{
	type			plug
	slave.pcm		"convert_system"
	hint.description	"Default device (system)"
}

#=====================================================
# Configuration for PCH
#-----------------------------------------------------

# Perform dmixer
pcm.dmixer_PCH
{
	type			dmix
	ipc_key			1026
	ipc_perm		0666

	hint
	{
		show		off
		description	"Direct mixing of multiple audio streams (PCH)"
	}

	slave
	{
		pcm		"hw:PCH,0"

		rate		192000
		channels	2
		format		S32_LE

		period_size	7680
		buffer_size	30720
	}
}

# Perform dsnooper
pcm.dsnooper_PCH
{
	type			dsnoop
	ipc_key			1027
	ipc_perm		0666

	hint
	{
		show		off
		description	"Recording from the same device for several applications simultaneously (PCH)"
	}

	slave
	{
		pcm		"hw:PCH,0"

		rate		192000
		format		S32_LE

		period_size	7680
		buffer_size	30720
	}
}

# Perform duplex
pcm.duplex_PCH
{
	type			asym
	playback.pcm		"dmixer_PCH"
	capture.pcm		"dsnooper_PCH"

	hint
	{
		show		off
		description	"Full duplex for simultaneous playback and recording (PCH)"
	}
}

# Perform convert
pcm.convert_PCH
{
	type			rate
	converter		fftrate

	hint
	{
		show		off
		description	"Sample rate converter (PCH)"
	}

	slave
	{
		pcm	"duplex_PCH"
		rate	192000
		format	S32_LE
	}
}

#=====================================================
# Configuration for default audio device
#-----------------------------------------------------

# Perform plug device
pcm.!default
{
	type			plug
	slave.pcm		"convert_PCH"
	hint.description	"Default device"
}

$ echo "Debian Default Sample Rate:  $(grep -r "defaults.pcm.dmix.rate" /usr/share/alsa/ | grep ":defaults" | cut -d\  -f2-) Hz"
Debian Default Sample Rate:  48000 Hz

$ grep -rE "defaults.pcm.dmix.rate|defaults.pcm.card|defaults.pcm.device" /usr/share/alsa/ | grep -E ":defaults.pcm.dmix.rate|:defaults.pcm.card|:defaults.pcm.device" | cut -d: -f2-
defaults.pcm.card 0
defaults.pcm.device 0
defaults.pcm.dmix.rate 48000

chown: cannot read directory '/home/rich/.local/share/containers/storage/overlay/.../work/work': Permission denied

➤ apt show mc
Package: mc
...
Homepage: https://www.midnight-commander.org
...
Description: Midnight Commander - a powerful file manager
...

$ audacious 2>&1 *.dsf
Input:  1411200 Hz, 2 ch, 's32_le' (0xa): dummy = 0, period = 56448
Output: 48000 Hz, 2 ch, 's16_le' (0x2): dummy = 0, period = 1920
Rates:  1411200 --> 48000 (J: 0.00%, T: FFT, W: Vorbis)
Ok.

debdir/usr/lib/libaudcore.so.5.5.0

$ apt show libasound2-plugin-fftrate
Package: libasound2-plugin-fftrate
Version: 1.6.3
Status: install ok installed
Priority: optional
Section: libs
Maintainer: Petrov Sergey <petrovse@mail.ru>
Installed-Size: 172 kB
Depends: libasound2, libasound2-plugins
Download-Size: unknown
APT-Manual-Installed: yes
APT-Sources: /var/lib/dpkg/status
Description: ALSA library additional plugin
 This package contains plugin for the ALSA library that are
 not included in the main libasound2 package.
 .
 The following plugins are included:
   - fftrate: FFT based rate converter
 .
 ALSA is the Advanced Linux Sound Architecture.
 .
 (Repackaged on Tue, 04 Nov 2025 03:13:01 +0100 by dpkg-repack.)