TGRadioBooks
Turn a textbook chapter into speech: prepare and check the text
To turn a textbook chapter into speech, first separate continuous explanation from material that requires looking: formulas, graphs and diagrams. Prepare the text outside TGRadio and keep the original available for comparison. Listening does not replace checking notation or the conditions of a problem, particularly when a small difference changes the meaning.
Choose one complete topic
For your first preparation, choose a section that introduces a question, explains it and completes the thought. Page boundaries do not always provide that structure. A definition may begin on the preceding spread, while a condition continues on the following page. Check both ends of the passage you select.
For example, an explanation of a physical law needs its conditions of application as well as its statement. If the chapter repeatedly refers to a diagram, decide whether you can look at it while listening. Removing those references alone will not make the explanation self-contained.
Check whether the text comes out in order
Try selecting and copying several paragraphs from the original PDF into an external editor. Use this as an initial check for mixed columns, broken lines and missing special characters. Selectable text is useful evidence, but does not guarantee that the whole document will be extracted in the correct order.
TGRadio accepts PDFs with a text layer, but does not recognise scans or images. A single file may contain both text pages and scanned pages. If the section you need exists only as an image, preparing it requires separate work outside TGRadio, followed by a comparison with the original.
Preserve the wording of definitions
In your working copy, distinguish a definition from the author’s example and from any explanation you add yourself. Avoid replacing an unfamiliar term with an approximate synonym when you need the textbook’s actual content. You can add spoken boundaries such as “Definition” and “Example” in an external editor.
Check abbreviations and letter symbols. For example, a single letter may represent a quantity in a formula while also appearing in ordinary text. If you expand an abbreviation, verify the expansion against the textbook. TGRadio has no pronunciation editor or automatic terminology correction.
Do not reconstruct a formula by guessing
TGRadio does not recognise formulas or images. Even when part of a mathematical expression appears in the text layer, check subscripts, powers, signs and element order. A missing minus sign or exponent can change the content while leaving the surrounding explanation apparently coherent.
If you can express a formula accurately in words, prepare that wording outside the app and compare it with the original. Otherwise, keep a clear instruction to open the relevant formula. For a graph, also check axis labels and units: a description of an increase or decrease can be ambiguous without them.
Compare the first playback with the textbook
Upload the prepared file, select the book and a voice, and press Play. Listen to a definition together with its explanation while keeping the original open. Then check a passage containing notation or a reference to a figure. Audio preparation starts after Play; further passages are prepared as you listen.
If you find a discrepancy, first establish whether the text itself was extracted correctly. Correct working-copy errors outside TGRadio and upload the revised file. When a discrepancy affects a formula or a problem’s conditions, consult the original before relying on that passage.