diff --git a/zx/_emulator.py b/zx/_emulator.py
index c4a8f72..2bcc621 100644
--- a/zx/_emulator.py
+++ b/zx/_emulator.py
@@ -33,6 +33,7 @@
 from ._machine import Dispatcher
 from ._machine import RunEvents
 from ._machine import Spectrum48
+from ._playback import PlaybackPlayer
 from ._rzx import RZXFile
 from ._tape import TapePlayer
 from ._time import Time
@@ -40,74 +41,6 @@
 from ._zxb import ZXBasicCompilerProgram
 
 
-# TODO: Rework to a time machine interface.
-class PlaybackPlayer(object):
-    def __init__(self, machine, file):
-        self.__machine = machine
-
-        assert isinstance(file, RZXFile)
-        self._recording = file
-
-    def find_recording_info_chunk(self):
-        for chunk in self._recording['chunks']:
-            if chunk['id'] == 'info':
-                return chunk
-        assert 0  # TODO
-
-    def get_chunks(self):
-        return self._recording['chunks']
-
-    def get_playback_samples(self):
-        # TODO: Have a class describing playback state.
-        self.playback_frame_count = 0
-        self.playback_chunk = 0
-        self.playback_sample_values = []
-        self.playback_sample_i = 0
-
-        frame_count = 0
-        for chunk_i, chunk in enumerate(self.get_chunks()):
-            if isinstance(chunk, MachineSnapshot):
-                self.__machine.install_snapshot(chunk)
-                continue
-
-            if chunk['id'] != 'port_samples':
-                continue
-
-            self.__machine.ticks_since_int = chunk['first_tick']
-
-            for frame_i, frame in enumerate(chunk['frames']):
-                num_of_fetches, samples = frame
-                # print(num_of_fetches, samples)
-
-                self.__machine.fetches_limit = num_of_fetches
-                # print(num_of_fetches, samples, flush=True)
-
-                # print('START_OF_FRAME', flush=True)
-                yield 'START_OF_FRAME'
-
-                for sample_i, sample in enumerate(samples):
-                    # print(self.fetches_limit)
-                    # fetch = num_of_fetches - self.fetches_limit
-                    # print('Input at fetch', fetch, 'of', num_of_fetches)
-                    # TODO: print('read_port 0x%04x 0x%02x' % (addr, n),
-                    #             flush=True)
-
-                    # TODO: Have a class describing playback state.
-                    self.playback_frame_count = frame_count
-                    self.playback_chunk = chunk
-                    self.playback_sample_values = samples
-                    self.playback_sample_i = sample_i
-                    # print(frame_count, chunk_i, frame_i, sample_i, sample,
-                    #       flush=True)
-
-                    yield sample
-
-                # print('END_OF_FRAME', flush=True)
-                yield 'END_OF_FRAME'
-
-                frame_count += 1
-
-
 # TODO: Eliminate this class. Move everything to Spectrum48.
 class Emulator(Spectrum48):
     _SPIN_V0P5_INFO = {'id': 'info',
diff --git a/zx/_playback.py b/zx/_playback.py
new file mode 100644
index 0000000..ec6a525
--- /dev/null
+++ b/zx/_playback.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+
+#   ZX Spectrum Emulator.
+#   https://github.com/kosarev/zx
+#
+#   Copyright (C) 2017-2021 Ivan Kosarev.
+#   ivan@kosarev.info
+#
+#   Published under the MIT license.
+
+from ._data import MachineSnapshot
+from ._rzx import RZXFile
+
+
+# TODO: Rework to a time machine interface.
+class PlaybackPlayer(object):
+    def __init__(self, machine, file):
+        self.__machine = machine
+
+        assert isinstance(file, RZXFile)
+        self._recording = file
+
+    def find_recording_info_chunk(self):
+        for chunk in self._recording['chunks']:
+            if chunk['id'] == 'info':
+                return chunk
+        assert 0  # TODO
+
+    def get_chunks(self):
+        return self._recording['chunks']
+
+    def get_playback_samples(self):
+        # TODO: Have a class describing playback state.
+        self.playback_frame_count = 0
+        self.playback_chunk = 0
+        self.playback_sample_values = []
+        self.playback_sample_i = 0
+
+        frame_count = 0
+        for chunk_i, chunk in enumerate(self.get_chunks()):
+            if isinstance(chunk, MachineSnapshot):
+                self.__machine.install_snapshot(chunk)
+                continue
+
+            if chunk['id'] != 'port_samples':
+                continue
+
+            self.__machine.ticks_since_int = chunk['first_tick']
+
+            for frame_i, frame in enumerate(chunk['frames']):
+                num_of_fetches, samples = frame
+                # print(num_of_fetches, samples)
+
+                self.__machine.fetches_limit = num_of_fetches
+                # print(num_of_fetches, samples, flush=True)
+
+                # print('START_OF_FRAME', flush=True)
+                yield 'START_OF_FRAME'
+
+                for sample_i, sample in enumerate(samples):
+                    # print(self.fetches_limit)
+                    # fetch = num_of_fetches - self.fetches_limit
+                    # print('Input at fetch', fetch, 'of', num_of_fetches)
+                    # TODO: print('read_port 0x%04x 0x%02x' % (addr, n),
+                    #             flush=True)
+
+                    # TODO: Have a class describing playback state.
+                    self.playback_frame_count = frame_count
+                    self.playback_chunk = chunk
+                    self.playback_sample_values = samples
+                    self.playback_sample_i = sample_i
+                    # print(frame_count, chunk_i, frame_i, sample_i, sample,
+                    #       flush=True)
+
+                    yield sample
+
+                # print('END_OF_FRAME', flush=True)
+                yield 'END_OF_FRAME'
+
+                frame_count += 1