Why dump the extra 64 kbps into MP3 when AAC+ can hit the same loudness and clarity with half the data? The codec matters as much as the bit‑rate. AAC+ pulls a tighter psycho‑acoustic model, so it squeezes out noise and preserves harmonic detail that MP3 tends to bleed. That means the same listener can hear a crisper high‑end and tighter bass in a 64 kbps AAC+ stream than in a 128 kbps MP3.

For the studio‑to‑air chain, the savings are real. AAC+ decoding is lightweight on the hardware, so less power and CPU headroom go to the encoding side—perfect for live automation rigs that run on embedded hardware. Bandwidth is halved too; two 64 kbps AAC+ streams fit the same pipe as one 128 kbps MP3, freeing up headroom for secondary feeds or redundancy. Modern consumer radios and mobile apps support AAC+ natively, so you don't lose compatibility; the old‑school CD‑Rippers still love MP3, but for broadcast you’re in the future with AAC+.

Make a quick audit:

• If your audience includes legacy receivers that choke on AAC+, keep a 128 kbps MP3 fallback.
• * For internet, DAB, HD‑TV, or digital sub‑carriers, switch the primary stream to 64 kbps AAC+.
• * Run a side‑by‑side perceptual test—listen for masking artifacts and overall loudness.
• * Update your transcoder presets: 64 kbps AAC+ with the same psycho‑acoustic target as 128 kbps MP3.

Drop the extra bandwidth, keep the quality, and let the codecs do the heavy lifting.