diff --git a/sys/dev/sound/chip.h b/sys/dev/sound/chip.h
deleted file mode 100644
--- a/sys/dev/sound/chip.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 1999 Seigo Tanimura
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-/*
- * These are the function codes assigned to the children of
- * sound cards.
- */
-enum {
-	SCF_PCM,
-	SCF_MIDI,
-	SCF_SYNTH,
-};
-
-/*
- * This is the device information struct, used by
- * a bridge device to pass the device function code
- * to the children.
- */
-struct sndcard_func {
-	int func;	/* The function code. */
-	void *varinfo;	/* Bridge-specific information. */
-};
diff --git a/sys/dev/sound/pci/csa.c b/sys/dev/sound/pci/csa.c
--- a/sys/dev/sound/pci/csa.c
+++ b/sys/dev/sound/pci/csa.c
@@ -45,7 +45,6 @@
 #endif
 
 #include <dev/sound/pcm/sound.h>
-#include <dev/sound/chip.h>
 #include <dev/sound/pci/csareg.h>
 #include <dev/sound/pci/csavar.h>
 
diff --git a/sys/dev/sound/pci/csamidi.c b/sys/dev/sound/pci/csamidi.c
--- a/sys/dev/sound/pci/csamidi.c
+++ b/sys/dev/sound/pci/csamidi.c
@@ -43,7 +43,6 @@
 #include <dev/pci/pcireg.h>
 #include <dev/pci/pcivar.h>
 
-#include <dev/sound/chip.h>
 #include <dev/sound/pcm/sound.h>
 
 #include <dev/sound/midi/midi.h>
diff --git a/sys/dev/sound/pci/csapcm.c b/sys/dev/sound/pci/csapcm.c
--- a/sys/dev/sound/pci/csapcm.c
+++ b/sys/dev/sound/pci/csapcm.c
@@ -36,7 +36,6 @@
 
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pcm/ac97.h>
-#include <dev/sound/chip.h>
 #include <dev/sound/pci/csareg.h>
 #include <dev/sound/pci/csavar.h>
 
diff --git a/sys/dev/sound/pci/emu10kx-midi.c b/sys/dev/sound/pci/emu10kx-midi.c
--- a/sys/dev/sound/pci/emu10kx-midi.c
+++ b/sys/dev/sound/pci/emu10kx-midi.c
@@ -43,7 +43,6 @@
 #include "opt_snd.h"
 #endif
 
-#include <dev/sound/chip.h>
 #include <dev/sound/pcm/sound.h>
 
 #include <dev/sound/midi/midi.h>
diff --git a/sys/dev/sound/pci/emu10kx-pcm.c b/sys/dev/sound/pci/emu10kx-pcm.c
--- a/sys/dev/sound/pci/emu10kx-pcm.c
+++ b/sys/dev/sound/pci/emu10kx-pcm.c
@@ -43,7 +43,6 @@
 #include "opt_snd.h"
 #endif
 
-#include <dev/sound/chip.h>
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pcm/ac97.h>
 
diff --git a/sys/dev/sound/pci/emu10kx.c b/sys/dev/sound/pci/emu10kx.c
--- a/sys/dev/sound/pci/emu10kx.c
+++ b/sys/dev/sound/pci/emu10kx.c
@@ -49,7 +49,6 @@
 #include "opt_snd.h"
 #endif
 
-#include <dev/sound/chip.h>
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pcm/ac97.h>
 
diff --git a/sys/dev/sound/pci/hdspe-pcm.c b/sys/dev/sound/pci/hdspe-pcm.c
--- a/sys/dev/sound/pci/hdspe-pcm.c
+++ b/sys/dev/sound/pci/hdspe-pcm.c
@@ -34,7 +34,6 @@
 
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pci/hdspe.h>
-#include <dev/sound/chip.h>
 
 #include <dev/pci/pcireg.h>
 #include <dev/pci/pcivar.h>
diff --git a/sys/dev/sound/pci/hdspe.c b/sys/dev/sound/pci/hdspe.c
--- a/sys/dev/sound/pci/hdspe.c
+++ b/sys/dev/sound/pci/hdspe.c
@@ -37,7 +37,6 @@
 
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/pci/hdspe.h>
-#include <dev/sound/chip.h>
 
 #include <dev/pci/pcireg.h>
 #include <dev/pci/pcivar.h>
diff --git a/sys/dev/sound/pci/solo.c b/sys/dev/sound/pci/solo.c
--- a/sys/dev/sound/pci/solo.c
+++ b/sys/dev/sound/pci/solo.c
@@ -35,7 +35,6 @@
 #include <dev/pci/pcivar.h>
 
 #include  <dev/sound/isa/sb.h>
-#include  <dev/sound/chip.h>
 
 #include "mixer_if.h"
 
diff --git a/sys/dev/sound/pcm/sound.h b/sys/dev/sound/pcm/sound.h
--- a/sys/dev/sound/pcm/sound.h
+++ b/sys/dev/sound/pcm/sound.h
@@ -321,6 +321,22 @@
 int sndstat_register(device_t dev, char *str);
 int sndstat_unregister(device_t dev);
 
+/* These are the function codes assigned to the children of sound cards. */
+enum {
+	SCF_PCM,
+	SCF_MIDI,
+	SCF_SYNTH,
+};
+
+/*
+ * This is the device information struct, used by a bridge device to pass the
+ * device function code to the children.
+ */
+struct sndcard_func {
+	int func;	/* The function code. */
+	void *varinfo;	/* Bridge-specific information. */
+};
+
 /*
  * this is rather kludgey- we need to duplicate these struct def'ns from sound.c
  * so that the macro versions of pcm_{,un}lock can dereference them.
diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c
--- a/sys/dev/sound/usb/uaudio.c
+++ b/sys/dev/sound/usb/uaudio.c
@@ -90,7 +90,6 @@
 #include <dev/sound/pcm/sound.h>
 #include <dev/sound/usb/uaudioreg.h>
 #include <dev/sound/usb/uaudio.h>
-#include <dev/sound/chip.h>
 #include "feeder_if.h"
 
 static int uaudio_default_rate = 0;		/* use rate list */
diff --git a/sys/dev/sound/usb/uaudio_pcm.c b/sys/dev/sound/usb/uaudio_pcm.c
--- a/sys/dev/sound/usb/uaudio_pcm.c
+++ b/sys/dev/sound/usb/uaudio_pcm.c
@@ -32,7 +32,6 @@
 #endif
 
 #include <dev/sound/pcm/sound.h>
-#include <dev/sound/chip.h>
 #include <dev/sound/usb/uaudio.h>
 
 #include "mixer_if.h"