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-rw-r--r--scripts/amp4.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/amp4.lua b/scripts/amp4.lua
index 6254082ad9..276b4a0af6 100644
--- a/scripts/amp4.lua
+++ b/scripts/amp4.lua
@@ -66,7 +66,7 @@ function dsp_run (ins, outs, n_samples)
for c = 1,#ins do -- process all channels
-- check if output and input buffers for this channel are identical
-- http://manual.ardour.org/lua-scripting/class_reference/#C:FloatArray
- if not ins[c]:sameinstance (outs[c]) then
+ if ins[c] ~= outs[c] then
-- http://manual.ardour.org/lua-scripting/class_reference/#ARDOUR:DSP
ARDOUR.DSP.copy_vector (outs[c]:offset (off), ins[c]:offset (off), siz)
end