diff --git a/docs/changes.rst b/docs/changes.rst
index 0dd360e..d63c7df 100644
--- a/docs/changes.rst
+++ b/docs/changes.rst
@@ -2,6 +2,11 @@
 
 Changelog
 ---------
+v1.6.4
+~~~~~~
+- Scaper.generate now accepts a new argument for controlling trade-off between speed and quality in pitch shifting and time stretching:
+    - quick_pitch_time: if True, both time stretching and pitch shifting will be applied in quick mode, which is much faster but has lower quality.
+
 v1.6.3
 ~~~~~~
 - Scaper.generate now accepts two new optional arguments for controlling audio clipping and normalization:
diff --git a/scaper/core.py b/scaper/core.py
index 9b2721c..fe9c3b7 100644
--- a/scaper/core.py
+++ b/scaper/core.py
@@ -223,6 +223,11 @@ def generate_from_jams(jams_infile,
     else:
         peak_normalization = False
 
+    if 'quick_pitch_time' in ann.sandbox.scaper.keys():
+        quick_pitch_time = ann.sandbox.scaper['quick_pitch_time']
+    else:
+        quick_pitch_time = False
+
     # Cast ann.sandbox.scaper to a Sandbox object
     ann.sandbox.scaper = jams.Sandbox(**ann.sandbox.scaper)
 
@@ -233,6 +238,7 @@ def generate_from_jams(jams_infile,
                            reverb=reverb,
                            fix_clipping=fix_clipping,
                            peak_normalization=peak_normalization,
+                           quick_pitch_time=quick_pitch_time,
                            save_isolated_events=save_isolated_events,
                            isolated_events_path=isolated_events_path,
                            disable_sox_warnings=disable_sox_warnings)
@@ -242,6 +248,7 @@ def generate_from_jams(jams_infile,
     ann.sandbox.scaper.reverb = reverb
     ann.sandbox.scaper.fix_clipping = fix_clipping
     ann.sandbox.scaper.peak_normalization = peak_normalization
+    ann.sandbox.scaper.quick_pitch_time = quick_pitch_time
     ann.sandbox.scaper.save_isolated_events = save_isolated_events
     ann.sandbox.scaper.isolated_events_path = isolated_events_path
     ann.sandbox.scaper.disable_sox_warnings = disable_sox_warnings
@@ -1746,6 +1753,7 @@ def _generate_audio(self,
                         reverb=None,
                         fix_clipping=False,
                         peak_normalization=False,
+                        quick_pitch_time=False,
                         save_isolated_events=False,
                         isolated_events_path=None,
                         disable_sox_warnings=True):
@@ -1776,6 +1784,10 @@ def _generate_audio(self,
             each isolated event is also scaled accordingly. Note: this will change
             the actual value of `ref_db` in the generated audio. The scaling
             factor that was used is returned.
+        quick_pitch_time : bool
+            When True (default=False), time stretching and pitch shifting will be
+            applied with `quick=True`. This is much faster but the resultant 
+            audio is generally of lower audio quality.
         save_isolated_events : bool
             If True, this will save the isolated foreground events and
             backgrounds in a directory adjacent to the generated soundscape
@@ -1922,12 +1934,12 @@ def _generate_audio(self,
 
                     # Pitch shift
                     if e.value['pitch_shift'] is not None:
-                        tfm.pitch(e.value['pitch_shift'])
+                        tfm.pitch(e.value['pitch_shift'], quick=quick_pitch_time)
 
                     # Time stretch
                     if e.value['time_stretch'] is not None:
                         factor = 1.0 / float(e.value['time_stretch'])
-                        tfm.tempo(factor, audio_type='s', quick=False)
+                        tfm.tempo(factor, audio_type='s', quick=quick_pitch_time)
 
                     # PROCESS BEFORE COMPUTING LUFS
                     tmpfiles_internal = []
@@ -2102,6 +2114,7 @@ def generate(self,
                  reverb=None,
                  fix_clipping=False,
                  peak_normalization=False,
+                 quick_pitch_time=False,
                  save_isolated_events=False,
                  isolated_events_path=None,
                  disable_sox_warnings=True,
@@ -2154,6 +2167,10 @@ def generate(self,
             `ref_db` value will be stored in the JAMS annotation. The SNR of
             foreground events with respect to the background is unaffected except
             when extreme scaling is required to achieve peak normalization.
+        quick_pitch_time : bool
+            When True (default=False), time stretching and pitch shifting will be
+            applied with `quick=True`. This is much faster but the resultant 
+            audio is generally of lower audio quality.
         save_isolated_events : bool
             If True, this will save the isolated foreground events and
             backgrounds in a directory adjacent to the generated soundscape
@@ -2253,7 +2270,8 @@ def generate(self,
                                      isolated_events_path=isolated_events_path,
                                      disable_sox_warnings=disable_sox_warnings,
                                      fix_clipping=fix_clipping,
-                                     peak_normalization=peak_normalization)
+                                     peak_normalization=peak_normalization,
+                                     quick_pitch_time=quick_pitch_time)
 
         # TODO: Stick to heavy handed overwriting for now, in the future we
         #  should consolidate this with what happens inside _instantiate().
@@ -2264,6 +2282,7 @@ def generate(self,
         ann.sandbox.scaper.reverb = reverb
         ann.sandbox.scaper.fix_clipping = fix_clipping
         ann.sandbox.scaper.peak_normalization = peak_normalization
+        ann.sandbox.scaper.quick_pitch_time = quick_pitch_time
         ann.sandbox.scaper.save_isolated_events = save_isolated_events
         ann.sandbox.scaper.isolated_events_path = isolated_events_path
         ann.sandbox.scaper.disable_sox_warnings = disable_sox_warnings
diff --git a/scaper/version.py b/scaper/version.py
index c65a965..98e03ab 100644
--- a/scaper/version.py
+++ b/scaper/version.py
@@ -3,4 +3,4 @@
 """Version info"""
 
 short_version = '1.6'
-version = '1.6.3'
+version = '1.6.4'
diff --git a/tests/data/regression/bgonly_soundscape_20200501_22050.jams b/tests/data/regression/bgonly_soundscape_20200501_22050.jams
index 4dd6f1c..df080c9 100644
--- a/tests/data/regression/bgonly_soundscape_20200501_22050.jams
+++ b/tests/data/regression/bgonly_soundscape_20200501_22050.jams
@@ -93,7 +93,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": 0.2,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/bgonly_soundscape_20200501_22050.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/bgonly_soundscape_20200501_22050.wav",
@@ -109,7 +109,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -20
+          "ref_db_generated": -20,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/data/regression/bgonly_soundscape_20200501_44100.jams b/tests/data/regression/bgonly_soundscape_20200501_44100.jams
index d1cf2cc..a1d2a1f 100644
--- a/tests/data/regression/bgonly_soundscape_20200501_44100.jams
+++ b/tests/data/regression/bgonly_soundscape_20200501_44100.jams
@@ -93,7 +93,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": 0.2,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/bgonly_soundscape_20200501_44100.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/bgonly_soundscape_20200501_44100.wav",
@@ -109,7 +109,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -20
+          "ref_db_generated": -20,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/data/regression/reverb_soundscape_20200501_22050.jams b/tests/data/regression/reverb_soundscape_20200501_22050.jams
index 38dbb8e..c74462e 100644
--- a/tests/data/regression/reverb_soundscape_20200501_22050.jams
+++ b/tests/data/regression/reverb_soundscape_20200501_22050.jams
@@ -235,7 +235,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": 0.2,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/reverb_soundscape_20200501_22050.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/reverb_soundscape_20200501_22050.wav",
@@ -251,7 +251,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -50
+          "ref_db_generated": -50,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/data/regression/reverb_soundscape_20200501_44100.jams b/tests/data/regression/reverb_soundscape_20200501_44100.jams
index cad1151..66bdb33 100644
--- a/tests/data/regression/reverb_soundscape_20200501_44100.jams
+++ b/tests/data/regression/reverb_soundscape_20200501_44100.jams
@@ -235,7 +235,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": 0.2,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/reverb_soundscape_20200501_44100.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/reverb_soundscape_20200501_44100.wav",
@@ -251,7 +251,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -50
+          "ref_db_generated": -50,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/data/regression/soundscape_20200501_22050.jams b/tests/data/regression/soundscape_20200501_22050.jams
index 508cab9..5d132d4 100644
--- a/tests/data/regression/soundscape_20200501_22050.jams
+++ b/tests/data/regression/soundscape_20200501_22050.jams
@@ -235,7 +235,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": null,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/soundscape_20200501_22050.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/soundscape_20200501_22050.wav",
@@ -251,7 +251,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -50
+          "ref_db_generated": -50,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/data/regression/soundscape_20200501_44100.jams b/tests/data/regression/soundscape_20200501_44100.jams
index 06b1496..927e9b8 100644
--- a/tests/data/regression/soundscape_20200501_44100.jams
+++ b/tests/data/regression/soundscape_20200501_44100.jams
@@ -235,7 +235,7 @@
           "allow_repeated_label": true,
           "allow_repeated_source": true,
           "reverb": null,
-          "scaper_version": "1.6.3",
+          "scaper_version": "1.6.4",
           "soundscape_audio_path": "tests/data/regression/soundscape_20200501_44100.wav",
           "isolated_events_audio_path": [],
           "audio_path": "tests/data/regression/soundscape_20200501_44100.wav",
@@ -251,7 +251,8 @@
           "disable_instantiation_warnings": true,
           "peak_normalization_scale_factor": 1.0,
           "ref_db_change": 0,
-          "ref_db_generated": -50
+          "ref_db_generated": -50,
+          "quick_pitch_time": false
         }
       },
       "time": 0,
diff --git a/tests/profile_results.csv b/tests/profile_results.csv
index 5e596ab..3d9c492 100644
--- a/tests/profile_results.csv
+++ b/tests/profile_results.csv
@@ -1,10 +1,11 @@
-time_of_run,scaper_version,python_version,system,machine,processor,n_cpu,n_workers,memory,n_soundscapes,execution_time,git_commit_hash
-2020-07-17 14:13:46.982171,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,149.7468,e0c08d4f6eb10bc0b337a9d47f86b3b110ed0836
-2020-07-17 14:59:33.707885,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,135.1724,c780d270b0ea0c691e1cc1dbf725d1c4b35e5299
-2020-07-20 14:39:41.950552,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,118.7033,8c0cfe3c14e06bf46bcd6480f6be5991b0fba077
-2020-07-21 11:04:32.178729,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,114.4563,e903933594cb86b187c6c79066f969a9653d1897
-2020-09-18 16:57:39.359920,1.4.0,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,121.6504,d9346f71a7992e7a2578186a7ad9238d93aa3e66
-2020-09-22 18:59:10.570372,1.6.0,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,98.4973,edfe1de5c6e46206f64d6b8218b490d074871d24
-2020-09-23 12:50:07.721451,1.6.1,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,97.5089,8ee6a0ddfadde9b1b7cc1fd96a3a8e513c8256e5
-2020-09-23 15:06:59.663871,1.6.2,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,62.1766,e0107122b3cadaa713e119ce68b843876024ee63
-2020-09-28 12:39:24.620412,1.6.3,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,62.6309,d779ef3d328e17d55239a893211774f9052d2168
+command,time_of_run,scaper_version,python_version,system,machine,processor,n_cpu,n_workers,memory,n_soundscapes,execution_time,git_commit_hash
+python tests/profile_speed.py,2020-07-17 14:13:46.982171,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,149.7468,e0c08d4f6eb10bc0b337a9d47f86b3b110ed0836
+python tests/profile_speed.py,2020-07-17 14:59:33.707885,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,135.1724,c780d270b0ea0c691e1cc1dbf725d1c4b35e5299
+python tests/profile_speed.py,2020-07-20 14:39:41.950552,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,118.7033,8c0cfe3c14e06bf46bcd6480f6be5991b0fba077
+python tests/profile_speed.py,2020-07-21 11:04:32.178729,1.3.8,3.7.7,Darwin,x86_64,i386,8,1,16.0 GB,100,114.4563,e903933594cb86b187c6c79066f969a9653d1897
+python tests/profile_speed.py,2020-09-18 16:57:39.359920,1.4.0,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,121.6504,d9346f71a7992e7a2578186a7ad9238d93aa3e66
+python tests/profile_speed.py,2020-09-22 18:59:10.570372,1.6.0,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,98.4973,edfe1de5c6e46206f64d6b8218b490d074871d24
+python tests/profile_speed.py,2020-09-23 12:50:07.721451,1.6.1,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,97.5089,8ee6a0ddfadde9b1b7cc1fd96a3a8e513c8256e5
+python tests/profile_speed.py,2020-09-23 15:06:59.663871,1.6.2,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,62.1766,e0107122b3cadaa713e119ce68b843876024ee63
+python tests/profile_speed.py,2020-09-28 12:39:24.620412,1.6.3,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,62.6309,d779ef3d328e17d55239a893211774f9052d2168
+python tests/profile_speed.py --quick,2020-09-28 13:58:39.939934,1.6.4,3.8.3,Darwin,x86_64,i386,8,1,16.0 GB,100,17.6575,c688a0f28bb19cfd49ec339fd43c1d168262e07f
diff --git a/tests/profile_speed.py b/tests/profile_speed.py
index 9f74e8a..3a1e26e 100644
--- a/tests/profile_speed.py
+++ b/tests/profile_speed.py
@@ -19,9 +19,18 @@
 import datetime
 import math
 import multiprocessing
+import argparse
+import sys
+
+parser = argparse.ArgumentParser()
+parser.add_argument('--quick', action='store_true')
+args = parser.parse_args()
+cmd_line = ' '.join(sys.argv)
+cmd_line = 'python ' + cmd_line
 
 # Download the audio automatically
 FIX_DIR = 'tests/data/'
+QUICK_PITCH_TIME = args.quick
 
 def get_git_commit_hash():
     process = subprocess.Popen(
@@ -130,6 +139,7 @@ def convert_size(size_bytes):
                     allow_repeated_source=True,
                     reverb=0.1,
                     disable_sox_warnings=True,
+                    quick_pitch_time=QUICK_PITCH_TIME,
                     no_audio=False,
                     txt_path=txtfile)
 
@@ -137,6 +147,7 @@ def convert_size(size_bytes):
     uname = platform.uname()
 
     row = {
+        'command': cmd_line,
         'time_of_run': str(datetime.datetime.now()),
         'scaper_version': scaper.__version__,
         'python_version': platform.python_version(),
diff --git a/tests/test_core.py b/tests/test_core.py
index 0933b67..1222deb 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -232,7 +232,7 @@ def test_generate_from_jams(atol=1e-5, rtol=1e-8):
         assert np.allclose(orig_wav, fj_soundscape_audio)
 
         regjam = jams.load(TEST_PATHS[44100]['REG'].jams)
-        sandbox_exclude = ['fix_clipping', 'peak_normalization']
+        sandbox_exclude = ['fix_clipping', 'peak_normalization', 'quick_pitch_time']
         _compare_scaper_jams(
             regjam, fj_soundscape_jam,
             exclude_additional_scaper_sandbox_keys=sandbox_exclude)
@@ -247,7 +247,7 @@ def test_generate_from_jams(atol=1e-5, rtol=1e-8):
         assert np.allclose(gen_wav, orig_wav, atol=atol, rtol=rtol)
 
         # validate jams
-        sandbox_exclude = ['fix_clipping', 'peak_normalization']
+        sandbox_exclude = ['fix_clipping', 'peak_normalization', 'quick_pitch_time']
         gen_jam = jams.load(gen_jam_file.name)
         _compare_scaper_jams(
             regjam, gen_jam,
@@ -390,6 +390,7 @@ def _validate_soundscape_and_event_audio(orig_wav_file,
             assert ann.sandbox.scaper.jams_path == orig_jam_file.name
             assert ann.sandbox.scaper.fix_clipping is False
             assert ann.sandbox.scaper.peak_normalization is False
+            assert ann.sandbox.scaper.quick_pitch_time is False
             assert ann.sandbox.scaper.save_isolated_events is False
             assert ann.sandbox.scaper.isolated_events_path is None
             assert ann.sandbox.scaper.disable_sox_warnings is True
@@ -434,6 +435,7 @@ def _validate_soundscape_and_event_audio(orig_wav_file,
             assert ann.sandbox.scaper.jams_path == orig_jam_file.name
             assert ann.sandbox.scaper.fix_clipping is True
             assert ann.sandbox.scaper.peak_normalization is False
+            assert ann.sandbox.scaper.quick_pitch_time is False
             assert ann.sandbox.scaper.save_isolated_events is False
             assert ann.sandbox.scaper.isolated_events_path is None
             assert ann.sandbox.scaper.disable_sox_warnings is True
@@ -463,6 +465,7 @@ def _validate_soundscape_and_event_audio(orig_wav_file,
             # assert ann.sandbox.scaper.jams_path == gen_jam_file.name
             assert ann.sandbox.scaper.fix_clipping is True
             assert ann.sandbox.scaper.peak_normalization is False
+            assert ann.sandbox.scaper.quick_pitch_time is False
             assert ann.sandbox.scaper.save_isolated_events is False
             assert ann.sandbox.scaper.isolated_events_path is None
             assert ann.sandbox.scaper.disable_sox_warnings is True
@@ -474,6 +477,72 @@ def _validate_soundscape_and_event_audio(orig_wav_file,
             assert ann.sandbox.scaper.ref_db_change != 0
             assert ann.sandbox.scaper.ref_db_generated != \
                    ann.sandbox.scaper.ref_db
+        
+        # Test when we generate ONLY a JAMS file, and then generate audio from the JAMS
+        # Case 3: WITH quick_pitch_time=True, no clipping
+        for _ in range(5):
+            (soundscape_audio, soundscape_jam, annotation_list, event_audio_list) = \
+                sc.generate(audio_path=orig_wav_file.name,
+                            jams_path=orig_jam_file.name,
+                            txt_path=orig_txt_file.name,
+                            no_audio=True,
+                            fix_clipping=True,
+                            quick_pitch_time=True,
+                            disable_instantiation_warnings=True)
+
+            assert soundscape_audio is None
+            assert event_audio_list is None
+            assert soundscape_jam is not None
+            assert annotation_list is not None
+
+            ann = soundscape_jam.annotations.search(namespace='scaper')[0]
+
+            assert ann.sandbox.scaper.audio_path == orig_wav_file.name
+            assert ann.sandbox.scaper.jams_path == orig_jam_file.name
+            assert ann.sandbox.scaper.fix_clipping is True
+            assert ann.sandbox.scaper.peak_normalization is False
+            assert ann.sandbox.scaper.quick_pitch_time is True
+            assert ann.sandbox.scaper.save_isolated_events is False
+            assert ann.sandbox.scaper.isolated_events_path is None
+            assert ann.sandbox.scaper.disable_sox_warnings is True
+            assert ann.sandbox.scaper.no_audio is True
+            assert ann.sandbox.scaper.txt_path == orig_txt_file.name
+            assert ann.sandbox.scaper.txt_sep is '\t'
+            assert ann.sandbox.scaper.disable_instantiation_warnings is True
+            assert ann.sandbox.scaper.peak_normalization_scale_factor == 1.0
+            assert ann.sandbox.scaper.ref_db_change == 0
+            assert ann.sandbox.scaper.ref_db_generated == \
+                   ann.sandbox.scaper.ref_db
+
+            (fj_soundscape_audio, fj_soundscape_jam, fj_annotation_list, fj_event_audio_list) = \
+                scaper.generate_from_jams(orig_jam_file.name,
+                                          audio_outfile=gen_wav_file.name,
+                                          jams_outfile=gen_jam_file.name,
+                                          txt_path=gen_txt_file.name)
+
+            assert fj_soundscape_audio is not None
+            assert fj_event_audio_list is not None
+            assert fj_soundscape_jam is not None
+            assert fj_annotation_list is not None
+
+            ann = fj_soundscape_jam.annotations.search(namespace='scaper')[0]
+
+            # assert ann.sandbox.scaper.audio_path == gen_wav_file.name
+            # assert ann.sandbox.scaper.jams_path == gen_jam_file.name
+            assert ann.sandbox.scaper.fix_clipping is True
+            assert ann.sandbox.scaper.peak_normalization is False
+            assert ann.sandbox.scaper.quick_pitch_time is True
+            assert ann.sandbox.scaper.save_isolated_events is False
+            assert ann.sandbox.scaper.isolated_events_path is None
+            assert ann.sandbox.scaper.disable_sox_warnings is True
+            assert ann.sandbox.scaper.no_audio is True  # TODO
+            # assert ann.sandbox.scaper.txt_path == gen_txt_file.name
+            assert ann.sandbox.scaper.txt_sep is '\t'
+            assert ann.sandbox.scaper.disable_instantiation_warnings is True
+            assert ann.sandbox.scaper.peak_normalization_scale_factor == 1.0
+            assert ann.sandbox.scaper.ref_db_change == 0
+            assert ann.sandbox.scaper.ref_db_generated == \
+                   ann.sandbox.scaper.ref_db
 
             # validate return API
             # _compare_scaper_jams(soundscape_jam, fj_soundscape_jam)
@@ -1489,6 +1558,7 @@ def test_scaper_instantiate():
             'fix_clipping',
             'peak_normalization',
             'peak_normalization_scale_factor',
+            'quick_pitch_time',
             'ref_db_change',
             'ref_db_generated',
             'txt_sep',