diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index 1c471eaa22..781a4e8783 100644
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -1417,7 +1417,7 @@ AUPlugin::render_callback(AudioUnitRenderActionFlags*,
 		if (valid) {
 			ioData->mBuffers[i].mData = input_buffers->get_audio (idx).data (cb_offsets[bus] + input_offset);
 		} else {
-			ioData->mBuffers[i].mData = silent_bufs.get_audio(0).data (cb_offsets[bus] + input_offset);
+			ioData->mBuffers[i].mData = silent_bufs.get_audio(0).data (0);
 		}
 	}
 	cb_offsets[bus] += inNumberSamples;
@@ -1536,7 +1536,7 @@ AUPlugin::connect_and_run (BufferSet& bufs,
 				if (valid) {
 					buffers->mBuffers[i].mData = bufs.get_audio (idx).data (offset);
 				} else {
-					buffers->mBuffers[i].mData = scratch_bufs.get_audio(0).data(offset);
+					buffers->mBuffers[i].mData = scratch_bufs.get_audio(0).data(0);
 				}
 			}
 		}
diff --git a/libs/ardour/ladspa_plugin.cc b/libs/ardour/ladspa_plugin.cc
index 76dedd78eb..6fd4942ea4 100644
--- a/libs/ardour/ladspa_plugin.cc
+++ b/libs/ardour/ladspa_plugin.cc
@@ -588,12 +588,12 @@ LadspaPlugin::connect_and_run (BufferSet& bufs,
 				const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++, &valid);
 				connect_port(port_index,
 				             valid ? bufs.get_audio(buf_index).data(offset)
-				                   : silent_bufs.get_audio(0).data(offset));
+				                   : silent_bufs.get_audio(0).data(0));
 			} else if (LADSPA_IS_PORT_OUTPUT(port_descriptor(port_index))) {
 				const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++, &valid);
 				connect_port(port_index,
 				             valid ? bufs.get_audio(buf_index).data(offset)
-				                   : scratch_bufs.get_audio(0).data(offset));
+				                   : scratch_bufs.get_audio(0).data(0));
 			}
 		}
 	}
diff --git a/libs/ardour/luaproc.cc b/libs/ardour/luaproc.cc
index b5109567fd..6241d4df8b 100644
--- a/libs/ardour/luaproc.cc
+++ b/libs/ardour/luaproc.cc
@@ -813,7 +813,7 @@ LuaProc::connect_and_run (BufferSet& bufs,
 				if (valid) {
 					in_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
 				} else {
-					in_map[ap + 1] = silent_bufs.get_audio (0).data (offset);
+					in_map[ap + 1] = silent_bufs.get_audio (0).data (0);
 				}
 			}
 			for (uint32_t ap = 0; ap < audio_out; ++ap) {
@@ -822,7 +822,7 @@ LuaProc::connect_and_run (BufferSet& bufs,
 				if (valid) {
 					out_map[ap + 1] = bufs.get_audio (buf_index).data (offset);
 				} else {
-					out_map[ap + 1] = scratch_bufs.get_audio (0).data (offset);
+					out_map[ap + 1] = scratch_bufs.get_audio (0).data (0);
 				}
 			}
 
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index a8619d079d..01aa41d36b 100644
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -2845,12 +2845,12 @@ LV2Plugin::connect_and_run(BufferSet& bufs,
 				index = in_map.get(DataType::AUDIO, audio_in_index++, &valid);
 				buf = (valid)
 					? bufs.get_audio(index).data(offset)
-					: silent_bufs.get_audio(0).data(offset);
+					: silent_bufs.get_audio(0).data(0);
 			} else {
 				index = out_map.get(DataType::AUDIO, audio_out_index++, &valid);
 				buf = (valid)
 					? bufs.get_audio(index).data(offset)
-					: scratch_bufs.get_audio(0).data(offset);
+					: scratch_bufs.get_audio(0).data(0);
 			}
 		} else if (flags & PORT_SEQUENCE) {
 			/* FIXME: The checks here for bufs.count().n_midi() > index shouldn't
diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index 62ee687d51..86b0368842 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -790,7 +790,7 @@ VST3Plugin::connect_and_run (BufferSet&  bufs,
 		index          = in_map.get (DataType::AUDIO, in_index++, &valid);
 		ins[i]         = (valid)
 		               ? bufs.get_audio (index).data (offset)
-		               : silent_bufs.get_audio (0).data (offset);
+		               : silent_bufs.get_audio (0).data (0);
 		_connected_inputs[i] = valid;
 	}
 
@@ -801,7 +801,7 @@ VST3Plugin::connect_and_run (BufferSet&  bufs,
 		index          = out_map.get (DataType::AUDIO, out_index++, &valid);
 		outs[i]        = (valid)
 		               ? bufs.get_audio (index).data (offset)
-		               : scratch_bufs.get_audio (0).data (offset);
+		               : scratch_bufs.get_audio (0).data (0);
 		_connected_outputs[i] = valid;
 	}
 
diff --git a/libs/ardour/vst_plugin.cc b/libs/ardour/vst_plugin.cc
index 2f6dc6a95f..e5d9b65b40 100644
--- a/libs/ardour/vst_plugin.cc
+++ b/libs/ardour/vst_plugin.cc
@@ -724,7 +724,7 @@ VSTPlugin::connect_and_run (BufferSet& bufs,
 		index = in_map.get(DataType::AUDIO, in_index++, &valid);
 		ins[i] = (valid)
 					? bufs.get_audio(index).data(offset)
-					: silent_bufs.get_audio(0).data(offset);
+					: silent_bufs.get_audio(0).data(0);
 	}
 
 	uint32_t out_index = 0;
@@ -734,7 +734,7 @@ VSTPlugin::connect_and_run (BufferSet& bufs,
 		index = out_map.get(DataType::AUDIO, out_index++, &valid);
 		outs[i] = (valid)
 			? bufs.get_audio(index).data(offset)
-			: scratch_bufs.get_audio(0).data(offset);
+			: scratch_bufs.get_audio(0).data(0);
 	}
 
 	if (bufs.count().n_midi() > 0) {