I tried converting some files to compare BPMs. Most of the files were originally either >192kbps or FLAC files. Original files at the top, then the corresponding converted file below. They're converted with Nero's AAC encoder at q0.19 Or ~45kbps). I also chose to compare FFT sizes of 2048 (standard, I believe?) and 8192. Sometimes, the differences between a converted file and its original are huge. For this small set of tracks - 47 beats per minute max! EDIT: Compared a set of FLAC files to AAC files at q0.40 and q0.20. Standard settings, using an FFT size of 2048. (I believe spaces should be the same on all systems, compared to tabs?)Artist || Title || BPM || Bitrate =============================================================================== Elvis Presley || (Marie's the Name) His Latest || 105 || 1007 Elvis Presley || (Marie's the Name) His Latest || 105 || 128 Elvis Presley || (Marie's the Name) His Latest || 105 || 55 Mark Knopfler & Emmylou Harris || All the Roadrunning || 154 || 908 Mark Knopfler & Emmylou Harris || All the Roadrunning || 98 || 125 Mark Knopfler & Emmylou Harris || All the Roadrunning || 105 || 52 Yann Tiersen || Le Banquet || 156 || 886 Yann Tiersen || Le Banquet || 156 || 132 Yann Tiersen || Le Banquet || 159 || 49 Travis || Closer || 107 || 980 Travis || Closer || 108 || 122 Travis || Closer || 108 || 52 Matchbox Twenty || Cold || 176 || 1130 Matchbox Twenty || Cold || 176 || 146 Matchbox Twenty || Cold || 176 || 60 Yann Tiersen || Comptine d'été n°17 || 173 || 1025 Yann Tiersen || Comptine d'été n°17 || 173 || 134 Yann Tiersen || Comptine d'été n°17 || 173 || 52 Nightwish || Dead Boy's Poem || 133 || 982 Nightwish || Dead Boy's Poem || 133 || 137 Nightwish || Dead Boy's Poem || 133 || 56 Yann Tiersen || La Dispute || 169 || 637 Yann Tiersen || La Dispute || 166 || 108 Yann Tiersen || La Dispute || 166 || 40 Coheed and Cambria || The End Complete IV: The Road || 93 || 1101 Coheed and Cambria || The End Complete IV: The Road || 139 || 143 Coheed and Cambria || The End Complete IV: The Road || 139 || 58 Nightwish || Ever Dream || 147 || 1107 Nightwish || Ever Dream || 147 || 143 Nightwish || Ever Dream || 147 || 59 Sigur Rós || Góðan daginn || 126 || 965 Sigur Rós || Góðan daginn || 166 || 138 Sigur Rós || Góðan daginn || 176 || 53 Dire Straits || Going Home (Theme From Local H || 167 || 862 Dire Straits || Going Home (Theme From Local H || 157 || 127 Dire Straits || Going Home (Theme From Local H || 153 || 50 Fall Out Boy || Grenade Jumper || 174 || 1119 Fall Out Boy || Grenade Jumper || 174 || 146 Fall Out Boy || Grenade Jumper || 174 || 61 Fall Out Boy || I'm Like a Lawyer With the Way || 193 || 1143 Fall Out Boy || I'm Like a Lawyer With the Way || 193 || 146 Fall Out Boy || I'm Like a Lawyer With the Way || 193 || 60 Mark Knopfler || The Last Laugh || 108 || 829 Mark Knopfler || The Last Laugh || 108 || 117 Mark Knopfler || The Last Laugh || 106 || 47 Thomas Newman || Marine || 150 || 641 Thomas Newman || Marine || 139 || 129 Thomas Newman || Marine || 139 || 47 Owl City || On the Wing || 115 || 1081 Owl City || On the Wing || 115 || 142 Owl City || On the Wing || 115 || 57 Mark Knopfler || One More Matinee || 160 || 816 Mark Knopfler || One More Matinee || 162 || 121 Mark Knopfler || One More Matinee || 160 || 47 Anberlin || Reclusion || 169 || 1112 Anberlin || Reclusion || 169 || 141 Anberlin || Reclusion || 169 || 58 Mark Knopfler || Secondary Waltz || 152 || 846 Mark Knopfler || Secondary Waltz || 152 || 111 Mark Knopfler || Secondary Waltz || 152 || 46 Elvis Presley || See See Rider || 144 || 1006 Elvis Presley || See See Rider || 144 || 119 Elvis Presley || See See Rider || 144 || 56 Coldplay || Strawberry Swing || 172 || 894 Coldplay || Strawberry Swing || 172 || 122 Coldplay || Strawberry Swing || 172 || 51 Dire Straits || Tunnel of Love || 154 || 978 Dire Straits || Tunnel of Love || 156 || 132 Dire Straits || Tunnel of Love || 154 || 52 Mew || Web || 104 || 974 Mew || Web || 104 || 130 Mew || Web || 104 || 55