MP3 files are rather large at 160 kbps and contain ID3 tags.
Those can be played on any device, but the other formats have the same audio quality at about half the filesize.
M4A is an MP4-container format, using the "AAC" (HE) codec at 80 kbps and contains MP4 tags.
OPUS files are OGG containers using the open source "OPUS" codec at 80 kbps and contain vorbis tags. Some older devices might not support them.
| # 1 | 2020-03-23, 65 min | OPUS (39.8 MB) | M4A (38.9 MB) | MP3 (75.1 MB) |
| # 2 | 2020-03-29, 86 min | OPUS (52.5 MB) | M4A (51.3 MB) | MP3 (99.2 MB) |
| # 3 | 2020-04-09, 69 min | OPUS (41.9 MB) | M4A (41 MB) | MP3 (79.2 MB) |
| # 4 | 2020-04-15, 70 min | OPUS (42.5 MB) | M4A (41.5 MB) | MP3 (80.3 MB) |
| # 5 | 2020-04-28, 71 min | OPUS (43.3 MB) | M4A (42.3 MB) | MP3 (81.9 MB) |
| # 6 | 2020-05-09, 69 min | OPUS (42.3 MB) | M4A (41.4 MB) | MP3 (79.9 MB) |
| # 7 | 2020-05-26, 63 min | OPUS (38.2 MB) | M4A (37.3 MB) | MP3 (72.2 MB) |
| # 8 | 2020-06-02, 65 min | OPUS (40 MB) | M4A (39.1 MB) | MP3 (75.5 MB) |
| # 9 | 2020-06-18, 79 min | OPUS (48 MB) | M4A (46.9 MB) | MP3 (90.8 MB) |
| # 10 | 2020-07-06, 68 min | OPUS (41.8 MB) | M4A (40.8 MB) | MP3 (78.8 MB) |
| # 11 | 2020-07-20, 75 min | OPUS (45.8 MB) | M4A (44.7 MB) | MP3 (86.3 MB) |
| # 12 | 2020-08-09, 72 min | OPUS (44.2 MB) | M4A (43.1 MB) | MP3 (83.4 MB) |
| # 13 | 2020-08-28, 75 min | OPUS (45.8 MB) | M4A (44.8 MB) | MP3 (86.5 MB) |
| # 14 | 2020-09-14, 70 min | OPUS (43 MB) | M4A (42 MB) | MP3 (81.2 MB) |
| # 15 | 2020-10-08, 72 min | OPUS (43.9 MB) | M4A (42.9 MB) | MP3 (82.8 MB) |
| # 16 | 2020-10-27, 73 min | OPUS (44.7 MB) | M4A (43.7 MB) | MP3 (84.3 MB) |
| # 17 | 2020-11-16, 73 min | OPUS (44.6 MB) | M4A (43.6 MB) | MP3 (84.3 MB) |
| # 18 | 2020-12-04, 73 min | OPUS (44.4 MB) | M4A (43.3 MB) | MP3 (83.7 MB) |
| # 19 | 2020-12-22, 69 min | OPUS (42 MB) | M4A (41 MB) | MP3 (79.2 MB) |
| # 20 | 2021-01-24, 79 min | OPUS (48.1 MB) | M4A (47 MB) | MP3 (90.8 MB) |
| # 21 | 2021-02-14, 76 min | OPUS (46.5 MB) | M4A (45.5 MB) | MP3 (87.8 MB) |
| # 22 | 2021-03-08, 67 min | OPUS (40.9 MB) | M4A (40 MB) | MP3 (77.2 MB) |
| # 23 | 2021-03-28, 78 min | OPUS (47.6 MB) | M4A (46.5 MB) | MP3 (89.8 MB) |
| # 24 | 2021-04-12, 74 min | OPUS (45.1 MB) | M4A (44 MB) | MP3 (85 MB) |
| # 25 | 2021-05-03, 81 min | OPUS (49.6 MB) | M4A (48.4 MB) | MP3 (93.6 MB) |
| # 26 | 2021-05-24, 76 min | OPUS (44.2 MB) | M4A (44.2 MB) | MP3 (87.6 MB) |
| # 27 | 2021-06-14, 76 min | OPUS (44.3 MB) | M4A (44.3 MB) | MP3 (87.7 MB) |
| # 28 | 2021-07-13, 70 min | OPUS (42.8 MB) | M4A (40.8 MB) | MP3 (80.8 MB) |
| # 29 | 2021-07-26, 71 min | OPUS (43.4 MB) | M4A (41.4 MB) | MP3 (81.9 MB) |
| # 30 | 2021-08-30, 75 min | OPUS (46 MB) | M4A (43.8 MB) | MP3 (86.8 MB) |
| # 31 | 2021-09-20, 76 min | OPUS (46.2 MB) | M4A (44.1 MB) | MP3 (87.3 MB) |
| # 32 | 2021-10-11, 90 min | OPUS (54.9 MB) | M4A (52.3 MB) | MP3 (103.6 MB) |
| # 33 | 2021-11-09, 78 min | OPUS (47.8 MB) | M4A (45.5 MB) | MP3 (90.2 MB) |
| # 34 | 2021-11-29, 78 min | OPUS (47.7 MB) | M4A (45.4 MB) | MP3 (89.9 MB) |
| # 35 | 2021-12-31, 73 min | OPUS (44.6 MB) | M4A (42.5 MB) | MP3 (84.1 MB) |
| # 36 | 2022-01-20, 76 min | OPUS (46.5 MB) | M4A (44.3 MB) | MP3 (87.8 MB) |
| # 37 | 2022-02-14, 78 min | OPUS (47.5 MB) | M4A (45.3 MB) | MP3 (89.6 MB) |
| # 38 | 2022-03-22, 83 min | OPUS (50.4 MB) | M4A (48.1 MB) | MP3 (95.2 MB) |
| # 39 | 2022-04-18, 75 min | OPUS (45.6 MB) | M4A (43.5 MB) | MP3 (86.1 MB) |
| # 40 | 2022-05-09, 79 min | OPUS (47.9 MB) | M4A (45.7 MB) | MP3 (90.4 MB) |
| # 41 | 2022-06-13, 85 min | OPUS (51.8 MB) | M4A (49.4 MB) | MP3 (97.8 MB) |
| # 42 | 2022-07-06, 71 min | OPUS (43.6 MB) | M4A (41.5 MB) | MP3 (82.2 MB) |
| # 43 | 2022-07-25, 75 min | OPUS (45.6 MB) | M4A (43.5 MB) | MP3 (86.1 MB) |
| # 44 | 2022-08-15, 74 min | OPUS (46.2 MB) | M4A (43.7 MB) | MP3 (85.4 MB) |
| # 45 | 2022-09-19, 72 min | OPUS (44.2 MB) | M4A (42.1 MB) | MP3 (83.4 MB) |
| # 46 | 2023-01-18, 100 min | OPUS (60.8 MB) | M4A (58 MB) | MP3 (114.7 MB) |