Index: atari_chips/pokeyv2/audiotypes.vhdl
===================================================================
--- atari_chips/pokeyv2/audiotypes.vhdl	(revision 1516)
+++ atari_chips/pokeyv2/audiotypes.vhdl	(revision 1517)
@@ -1,12 +1,12 @@
 LIBRARY ieee;
 USE ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
 
 package AudioTypes is
 
-type SID_AUDIO_TYPE is array(NATURAL range<>) of std_logic_vector(15 downto 0);
-type PSG_AUDIO_TYPE is array(NATURAL range<>) of std_logic_vector(15 downto 0);
+type SIGNED_AUDIO_TYPE is array(NATURAL range<>) of signed(15 downto 0);
+type UNSIGNED_AUDIO_TYPE is array(NATURAL range<>) of unsigned(15 downto 0);
 type PSG_CHANNEL_TYPE is array(NATURAL range<>) of std_logic_vector(4 downto 0);
 type POKEY_AUDIO is array(NATURAL range<>) of std_logic_vector(3 downto 0);
-type SAMPLE_AUDIO_TYPE is array(NATURAL range<>) of std_logic_vector(15 downto 0);
 
 end package AudioTypes;