Nes_Snd_Emu Change Log
----------------------

Nes_Snd_Emu 0.1.7
-----------------
- Created discussion forum: http://groups.google.com/group/blargg-sound-libs

- Added simplified version of APU to make it easy to get started

- Added Konami VRC6 and Namco 106 sound chip emulators

- Added support for APU's non-linear output

- Added demo of using SDL sound, along with helpful Sound_Queue

- Improved documentation

- Redid state snapshot support


Nes_Snd_Emu 0.1.5
-----------------
- Changed licensing to GNU Lesser General Public License (LGPL)

- Partially implemented DMC non-linearity when its value is directly set using
$4011, which reduces previously over-emphasized "popping" of percussion on some
games (TMNT II in particular)

- Implemented workaround for MSVC++ 6 compiler limitations, allowing it to work
on that compiler again

- Changed error return value of Blip_Buffer::sample_rate() to blargg_err_t
(defined in blargg_common.h), to make error reporting consistent with other
functions. This means the "no error" return value is the opposite of what it
was before, which will break current code which checks the error return value:

	// current code (broken)
	if ( !buf.sample_rate( samples_per_sec ) )
		out_of_memory();
	
	// quick-and-dirty fix (just remove the ! operation)
	if ( buf.sample_rate( samples_per_sec ) )
		out_of_memory();
	
	// proper fix
	blargg_err_t error = buf.sample_rate( samples_per_sec );
	if ( error )
		report_error( error );

- Added sample clamping to Blip_Buffer::read_samples(), allowing higher volume
with little distortion

- Changed 'size_t' values in Blip_Buffer interface to 'long'

- Changed demo to generate a WAVE sound file rather than an AIFF file

- Updated to Blip_Buffer 0.3.2


Nes_Snd_Emu 0.1.4
-----------------
- Moved NSF player-related modules to Game_Music_Emu library

- Added note about compiler optimizer bugs and workaround for one that was
found

- Nes_Apu::write_register() now takes the actual memory address, rather than
register number  (i.e. it now takes 0x4015 rather than 0x15). An assertion was
added to catch the old usage. See Nes_Apu.h.

- Replaced Blip_Buffer::buffer_size() and Blip_Buffer::units_per_sample() with
simpler functions (see Blip_Buffer.h and updated demo)

	// old way
	if ( !buf.buffer_size( sample_count ) )
		out_of_memory();
	buf.units_per_sample( clocks_per_sec / samples_per_sec );
	
	// new way
	int length = 1000 / 2; // 1/2 second buffer length
	if ( !buf.sample_rate( samples_per_sec, length ) )
		out_of_memory();
	buf.clock_rate( clocks_per_sec );

- Renamed Nes_Apu::master_volume() to volume()

- Added Nes_Apu::output() to assign all oscillators in one call.

- Changed Nes_Apu_Reflector.cpp to better insulate it:

	if ( load ) apu.noise.was_playing = true;   // removed
	if ( load ) apu.dmc.last_amp = apu.dmc.dac; // removed
	if ( load ) apu.state_restored();  // added to end of reflect_apu()

- Expanded notes

- Updated to Blip_Buffer 0.3.0

- Improved demo code

- Made assertions more descriptive when they fail

- Fixed problem with Solstice and the noise oscillator

- Added usage.txt with full examples of use in a NES emulator

- Optimized Nes_Apu::earliest_irq() and irq_notifer() invocation


Nes_Snd_Emu 0.1.3
-----------------
- Added and moved documentation. References are now in header files.

- Nes_Apu has full support for frame and DMC IRQs.

- Nes_Apu supports Blip_Buffer's improved treble equalization.

- Added Nes_Apu_Reflector for saving and restoring the APU's sound state
to/from a file. Meant for emulators which freeze exact game state.

- Reworked Nes_Snd_Emu's interface; the inherent fixed frame rate has been
eliminated.

- Added NES_SND_EMU_QUALITY setting.

- Deprecated Nes_Channel and nes_sample_t; use Blip_Buffer and blip_sample_t
instead.


Nes_Snd_Emu 0.1
---------------
- Numerous changes from previous releases.