diff --git a/dlls/strmbase/Makefile.in b/dlls/strmbase/Makefile.in
index a51691b1ba7..c58a3591739 100644
--- a/dlls/strmbase/Makefile.in
+++ b/dlls/strmbase/Makefile.in
@@ -1,7 +1,6 @@
 MODULE    = libstrmbase.a
 
 C_SRCS = \
-	audio.c \
 	dispatch.c \
 	dllfunc.c \
 	enumpins.c \
diff --git a/dlls/strmbase/audio.c b/dlls/strmbase/audio.c
deleted file mode 100644
index 6ad64610f07..00000000000
--- a/dlls/strmbase/audio.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * Generic Implementation of strmbase audio classes
- *
- * Copyright 2012 Aric Stewart, CodeWeavers
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
-
-#include "strmbase_private.h"
-
-static inline BasicAudio *impl_from_IBasicAudio(IBasicAudio *iface)
-{
-    return CONTAINING_RECORD(iface, BasicAudio, IBasicAudio_iface);
-}
-
-HRESULT WINAPI BasicAudio_Init(BasicAudio *pBasicAudio, const IBasicAudioVtbl *lpVtbl)
-{
-    pBasicAudio->IBasicAudio_iface.lpVtbl = lpVtbl;
-    BaseDispatch_Init(&pBasicAudio->baseDispatch, &IID_IBasicAudio);
-
-    return S_OK;
-}
-
-HRESULT WINAPI BasicAudio_Destroy(BasicAudio *pBasicAudio)
-{
-    return BaseDispatch_Destroy(&pBasicAudio->baseDispatch);
-}
-
-HRESULT WINAPI BasicAudioImpl_GetTypeInfoCount(IBasicAudio *iface, UINT *pctinfo)
-{
-    BasicAudio *This = impl_from_IBasicAudio(iface);
-
-    return BaseDispatchImpl_GetTypeInfoCount(&This->baseDispatch, pctinfo);
-}
-
-HRESULT WINAPI BasicAudioImpl_GetTypeInfo(IBasicAudio *iface, UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo)
-{
-    BasicAudio *This = impl_from_IBasicAudio(iface);
-
-    return BaseDispatchImpl_GetTypeInfo(&This->baseDispatch, &IID_NULL, iTInfo, lcid, ppTInfo);
-}
-
-HRESULT WINAPI BasicAudioImpl_GetIDsOfNames(IBasicAudio *iface, REFIID riid, LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId)
-{
-    BasicAudio *This = impl_from_IBasicAudio(iface);
-
-    return BaseDispatchImpl_GetIDsOfNames(&This->baseDispatch, riid, rgszNames, cNames, lcid, rgDispId);
-}
-
-HRESULT WINAPI BasicAudioImpl_Invoke(IBasicAudio *iface, DISPID dispIdMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams, VARIANT *pVarResult, EXCEPINFO *pExepInfo, UINT *puArgErr)
-{
-    BasicAudio *This = impl_from_IBasicAudio(iface);
-    ITypeInfo *pTypeInfo;
-    HRESULT hr;
-
-    hr = BaseDispatchImpl_GetTypeInfo(&This->baseDispatch, riid, 1, lcid, &pTypeInfo);
-    if (SUCCEEDED(hr))
-    {
-        hr = ITypeInfo_Invoke(pTypeInfo, &This->IBasicAudio_iface, dispIdMember, wFlags, pDispParams, pVarResult, pExepInfo, puArgErr);
-        ITypeInfo_Release(pTypeInfo);
-    }
-
-    return hr;
-}
diff --git a/include/wine/strmbase.h b/include/wine/strmbase.h
index e762f44c51d..62dcf741e1d 100644
--- a/include/wine/strmbase.h
+++ b/include/wine/strmbase.h
@@ -638,22 +638,6 @@ HRESULT WINAPI strmbase_renderer_init(BaseRenderer *filter, const IBaseFilterVtb
         const BaseRendererFuncTable *func_table);
 void strmbase_renderer_cleanup(BaseRenderer *filter);
 
-#ifdef __IBasicAudio_FWD_DEFINED__
-typedef struct tagBasicAudio
-{
-	IBasicAudio IBasicAudio_iface;
-	BaseDispatch baseDispatch;
-} BasicAudio;
-
-HRESULT WINAPI BasicAudio_Init(BasicAudio *This, const IBasicAudioVtbl *Vtbl);
-HRESULT WINAPI BasicAudio_Destroy(BasicAudio *pBasicAudio);
-
-HRESULT WINAPI BasicAudioImpl_GetTypeInfoCount(IBasicAudio *iface, UINT*pctinfo);
-HRESULT WINAPI BasicAudioImpl_GetTypeInfo(IBasicAudio *iface, UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo);
-HRESULT WINAPI BasicAudioImpl_GetIDsOfNames(IBasicAudio *iface, REFIID riid, LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId);
-HRESULT WINAPI BasicAudioImpl_Invoke(IBasicAudio *iface, DISPID dispIdMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams, VARIANT *pVarResult, EXCEPINFO *pExepInfo, UINT *puArgErr);
-#endif
-
 /* Dll Functions */
 BOOL WINAPI STRMBASE_DllMain(HINSTANCE hInstDLL, DWORD fdwReason, LPVOID lpv);
 HRESULT WINAPI STRMBASE_DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID *ppv);