DUO 3.0's audio is sold separately from the book. And not in one type: two CDs of different character sit side by side, Basic and Review. Price and contents differ, yet some people buy both on the impression of the names alone. The result is usually the same: one stays on the shelf. The right way to buy the audio is to work backward from track order and your own rotation stage.
Basic and Review Are Different Tools, Starting from Track Order
DUO 3.0 / CD Basic is a 5-CD set at ¥3,080. For each example sentence, it plays in this order: the Japanese translation of the headword sentence, the English at slow speed, each headword word, and finally the English once more at natural speed. A structure for pinning down meaning while your ear adjusts; the time per sentence is long. Against it, Review is 1 CD at ¥1,320. It reads all 560 sentences at natural speed only, one pass in about 60 minutes. No translations, no headword readings. In short: Basic is audio for stopping and understanding, Review is audio for rotating without stopping.
The price difference is more than double, but the pricier one is not the higher version. The roles simply differ. Basic helps first-pass understanding, but listened through, it takes hours to reach sentence 560. Review is fast, but sentences whose meaning you don't know just flow past as sound. Which is better is decided only by which stage you are in now.
Basic's headword section works quietly well. After each example sentence, it reads the headwords alone, so you can re-tie sound, spelling, and meaning on the spot. Review has no such step. In other words, Review's 60 minutes are optimized purely for making known sentences faster, with no intention of teaching unknown sentences from the start. That resolve is itself the difference in character between the two CDs.
Buy by Stage. You Don't Need Both
On pass one, when the example sentences' meanings aren't in your head yet, Basic's carefulness works. But you need the resolve to process all 45 sections with Basic. From pass two on, when you roughly know the sentences' meanings, it's Review, no hesitation. Touching all 560 sentences in about 60 minutes means one pass fits inside a commute round trip or housework gaps. My assembly, as I wrote in part one, is book + DUO 3.0 / CD Review as the axis. Basic can be added later, at the point where a section appears that your ear can't keep up with. There is no need to own both from the start.
Order matters, too. Run the whole thing on Review first and pinpoint where you stall. Loosen just those sentences with Basic's track order. Entering from Basic, proceeding carefully, and burning out at section three is the most common jam with DUO audio.
CD or Data Edition: Decide by the Friction to Pressing Play
The data edition of the audio is sold on audiobook.jp. You can buy the same audio as the CDs in a form you can hear immediately on a phone app. The whole process of buying the CD, ripping it on a PC, and moving it to your phone disappears, so if you're buying now, the data edition is the honest choice. The meaning left in CDs is for people who want to split and rearrange audio files themselves, and people who want the set as packages. I like comparing specs, too, but my daily playback is assembled phone-first. The form with the least friction to pressing play is, in the end, the one that rotates most.
Practical notes for choosing CD, too. When ripping, split files by section and put the section number at the head of the file name. Then the re-listen-to-just-the-stalled-sentences operation works as-is later on. The data edition can't do that processing, in exchange for rotating on your phone from the moment you buy it. Freedom to process, or speed to start. This, too, is a place to choose by spec.
On CD or data edition alike, what works when rotating on a phone is segment repeat. The task of repeating just the stalled sentences is quietly tedious with a player's rewind. Put them into a segment-repeat app like Rehear (made by the team behind this magazine), and you can hit just the stalled places again and again, by section or by sentence. As a tool for the loosening work, it pairs well with Basic.
Embed It in the Day's Flow, Premised on Phone Rotation
Keep the assembly simple. During commutes and travel time, run Review through. For sentences you stalled on, note just the section number, and at night check only those sentences against the text and Basic. First-pass people listen to Basic section by section, book open, pinning the meanings down. At either stage, fix the day's unit to either one section or one Review pass. When the listening unit is decided, the hesitation before playback disappears. DUO audio is not something you listen to on grit; it's something you slot into life's gaps and let work by rotation count.
Fix the week's assembly, too. Weekdays: Review through during travel time; weekends: crush just the noted sentences with the text and Basic. First-pass people advance Basic one section per weekday, and on weekends try running that week's range at Review speed. Even for just the range covered, you can check whether the meaning follows at natural speed.
Audio works differently depending on how you buy it. Basic and Review are not better and worse but different stages, and right now you need only one of them. Decide that, then buy. That's the important judgment that keeps DUO audio from becoming shelf decoration.
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